If it's at all possible, I recommend going through the screening process with EF. The ladies are all very attractive and professional, and I can honestly say that I have never had a bad experience with EF.
I talked with Brook yesterday and (as Bristol pointed out already) they are in the process of improving the response time on appt requests. For a while now the process has been to request an appt on the web site and then wait for Brook to contact you and confirm. As you can imagine she's been very busy dealing with all of the requests basically by herself. Starting this week they're making a change that will, hopefully, quicken the response time.
P.S. Bristol is a sweet, sexy girl and would be a terrific choice for an EF first time client. I have another appointment scheduled with her myself. She's one of my ATFs.