You must be joking, you honestly think 4 hours? Do you think these women are sitting around all day with no other life but to answer your emails etc. I could see if they were on tour, last minute, or the client gave them the necessary screening they needed in the first email. People have lives, families and other jobs. So if the client doesn't respond to a providers email in four hours what then?...Just saying your time frame is a little unrealistic, they may be at the gym.

I could understand a day or two as I plan ahead and I am not impatient. Fail to plan, plan to fail.

You guys (if you all are) are kidding your selves, I get my e-mail faster on my s3 then my laptop.  
   Good luck out there and be careful.

...and place to reply to a request. Also, she likely has to check her schedule and rearrange her life a bit to accommodate an appointment before she can give you a definite reply. More often than not, I'm not able to check or reply to private emails while I'm at work. I think 24 to 36 hours is reasonable. Some ladies can take same day requests, some can't.

A lot of times I have on my calendar that I'm away and I still get requests. Or, I get requests from people where I have to send three or four emails to get the information I need. I also get requests for weeks later.  

I would love to be able to answer more quickly, but I'm bombarded by all sorts of emails that take a lot of time to answer and I'm generally really busy in my personal life.  

I like the 48 hour rule, but hoping that my friends understand when I don't get back to them immediately.