I’ve been thinking about this lately because it feels like no matter what you do, it can be taken the wrong way.

Reply too fast… and some people might think you’re too eager or don’t have much going on.

Reply too slow… and now it looks like you’re not interested or just keeping them as an option.

But in reality, life happens. People get busy, distracted, or just don’t live on their phones all day.

Personally, I don’t mind a quick reply if the conversation feels natural. And I don’t mind a slower reply either, as long as there’s still effort and consistency there.

I think what matters more is intent. Are you actually trying to get to know the person, or just replying when it’s convenient?

Because I’ve had both fast replies with no substance, and slower replies that actually felt meaningful.

So now I’m curious…

Do you see fast or slow replies as a red flag? Or does it depend on the person?

Fast replies shows effort and consistency.
Slow replies are a red flag... as it indicates no real interest.
People have their phones with them at all times and it takes 10 seconds to reply....being busy is the buzz word for no interest and it shows , especially if it is the beginning of a relationship.

You've already answered your own question.
The answer being neither are necessarily a red flag and at the same time both could be.
You've also already explained why this is.

No offense, but this is sheer nonsense.
I'm not on my phone all day long, nor do I check it all day long.
But the biggest error you make is that it only takes 10 seconds to reply.
It does not!
Unless you want a meaningless reply.
It takes a certain mindset to reply to someone you like.
When I'm at the cash register in the supermarket or walking round with my trolley I am not going to check my phone and most certainly not reply to someone on a dating app.
When I'm cycling home with my groceries I'd have to stop, open my jacket to get my phone out of my inner pocket, which is annoying as it's got velcro closing. Then read the message without my reading glasses.
By that time I'm really not chuffed as I got interrupted, I'm catching a cold as my coat is open. If it's raining or there's a strong wind my mood will go below 0.
The last thing in the world I'm in the mood for is reply to a man. Typing a message with 2 fingers, which always P me O as it's impractical, balancing my bicycle with shopping bag on it while I do that?
He can wait till I'm home, in the mood, nice and warm with a cup of coffee and behind the PC so I can type with 8 fingers.

The same goes when I'm cooking, on the loo, in the shower, busy painting, simply not in the mood, feeding my cats, making coffee, and so on and so forth.

You may me talking/dating but that doesn't mean I'm available at every beck & call.
Nor do I expect the other to be.

To me it is about content, what are they replying. I would rather wait for something thoughtful than just a one or two word reply. To me, the short reply is more of a red flag than the time. If you right out something and they just reply with an "ok" or something then it shows me that they are not interested enough to make an effort.

This site is also a webpage for computers, not just an app for phones. Not everyone has that electric leash tied to their hand...lol. My phone is just a phone, no internet or texting. So I would be looking for someone who understands that and is not so addicted to their phone that they assume everyone else is also. But that is just me, each of us will have different ideas and what is a red flag for them...message time would not be one for me.

Good Luck

I reply at my own pace.. sometimes it takes longer to craft a well worded response.. sometimes I'm simply enjoying the exchange so much, I stick around to keep the conversation flowing..

I don't "mingle" on my cell, I'm on my desktop and not always in my home office, plus I might be busy doing some chore or project/reno so not necessarily available to send an immediate reply..

suffice to say I don't LIVE on the internet..

that said, IF I'm engaging in an interesting conversation with someone online, I'll first check to see if that person is also online, if yes, I'd hope to get a fairly quick reply, if not, I'll go do something else and check back in a bit.. if I've got something going offline (project/reno/chore/cooking etc) I'll be kind enough to let that person know that I'll be back later or in a bit, however long I feel it might take, thus letting that person know I respect their time, and would hope they can respect mine as well..

so in answer to your questions.. neither.. but it all depends on the exchange content & if there is mutual respect...
not a red flag if they reply quickly but with substance, continuing the conversation and wanting to engage to know more about the other
not a red flag if they take their time, although being told they've got work etc and they'll be back later would be acceptably respectful

@ Crystal.

Absolutely no offense! As I know you cannot handle other people's opinions, especially if they differ from yours. I have observed this over the years and your interactions with other posters to .

What I express is totally my experience and my opinion alone .. This is not a debate . The OP asked a question and I was merely stating my answer.

I dated a woman who said she was always busy doing stuff and had no time to answer ... busy busy. Yet when I took her out on a date to a fine dinning place , she never stopped checking her phone during our dinner .which led me to conclude...she was lying or just covering up her inefficient time management.
If a woman was truly interested in a guy , she will make time for him, and vice versa....no excuses... thats been a huge life experience for me !!!