I think we need some context to this discussion.
If she takes hours to get back to you only rarely , or during hours that you know she is really busy( work, School, Gym) then of course any mature person can understand that.
But if it happens habitually, seemingly every time you reach out to her, then there is no excuse. Dead her and move on please.
It can’t be stressed enough, and I really want my young brehs to understand this:
People make time for who they VALUE!!!
That SAME girl that got you tight cause she takes hours to get back to you is MAD AS FUKK that a dude SHE ACTUALLY VALUES is taking hours to GET BACK TO HER!
The best example for this is OURSELVES, we all know we would put way more effort into consistent communication with a girl we look at as a dime, as opposed to some jump off that we deal with when everything else is dry.