I know I'm a bit late to the game on this one, but I figured I'd share my two cents anyhow.  I got our phones on 11/5, sent the rebate on 11/17 and the site said they received them on 11/22.  The check was dated 12/22 and I received my check on 1/3/11.  Overall that’s a pretty quick turnaround, much faster, and better, than my experience with T-Mobile, which “never received” one of my rebate forms when I sent two at the same time for my wife and my phones.  I’m two months in with Sprint and the Epic and I couldn’t be happier.  Love this phone, even if it doesn’t have the latest and greatest OS.