life :)

It could be an old screencap before the time gap became a thing/staged

it looks like it was made with this version of iOS, plus it's said the time since iphone was a thing

No I mean you know how if you wait a while to send a second text there's a larger gap between the bubbles?

No there isn't.
Do you mean the line where it says what time the next text was sent, if there's been a reasonable amount of time passage?