I got one for my girlfriend for her birthday in January as I knew she wouldn't care about the difference.
I'm waiting because I'll know about the difference even if I don't happen to use the extra processor all the time. I do actually do a fair bit a lightroom and RAW processing so I think waiting is the right call.
I've got an old first gen C2D iMac that is holding me over.
I have to say, with all the iPad talk, I'm tempted to go for a Lenovo x201 tablet which is coming out next week and forget the new MBP. I was nice of Lenovo to pre-announce release dates, specs and give units to reviewers prior to launch, very civilized of them.