I have had several times a provider call me not just hours but even a whole day later.
Here is were this stems from because I know my actions play a part. I build up a list of who I think I like to meet at that time and then I call.
If the call goes to VM I just assume she is busy and I leave a message. If she happens to call back while it is still convenient and I haven't arranged something with someone else on the list then great. Else I moved on.
For the most part I tend to have the possibly wrong attitude a provider is either busy unavailable or just unavailable. Meaning she is either with someone or on her own time. Which usually from what I seen means if you didn't happen to get her at the right time it can be quite a while before you meet. If she is with someone if she is any ways decent she is going to want to get cleaned up before seeing you.
If she answers you while she is in a session not sure she is the one I really want to meet. Granted if she accidentally left the phone on and doesn't usually do it that is one thing but you can't know that with out knowing the person over time.
So should you give 5 minutes or some time for them to call you back or has anyone else tended to find that just ads up to a lot of waiting around which usually doesn't pan out. So many providers leave important info off their ads like what side of town they are working from. Such as I am in sugar land if you are on the north side unless I find you extraordinary you will be hard pressed to get me to pay the extra 100 most want to come down to here. There is a few I have on my list that fit that though.
What gets me is the calls I get hours and as I said above a whole day later. "Did you call me?" Na, my phone decided to all by itself and the message on there is Marvin Martian. duh. Ok, If I haven't talked to you in an hour I probably already gotten what I needed from someone else. Calling 4 hours later makes no sense. I know my phone shows when a call was received. Unless you are walking around with a 6+ year old cell phone I think most do these days.
For me it doesn't cause any problems I could see someone not having a hobby phone that has to worry about the issue being at work or some place getting a call and not expecting it.
So my suggestion to any women who don't do it already check the time the call was received and if it is over 2 hours don't call them back unless you know them and it won't cause an issue.