I understand. It was one of those situations where I know I'm right, but unwilling to go digging around to prove it. Believe it, don't, whatever.. that kind of thing.
It's not easy to Google really. It was to be excluded, then it was to be included.. then it wasn't included after all. It makes for a pita to search.
It really wasn't that hard to find on Intel site a lack of any USB 3.0 evidence, or quick google "Sandy bridge" One of the first hits is wikipedia, never mention USB 3.0 for Sandy Bridge, but having it mentioned for Ivy Bridge. Takes 30 seconds tops.
The internet is full of people throwing claims around that they "know", without a source its hard to believe anything, more so on something like this reports so many times differently.
But yes you were correct, so I'm glad Apple's lack of USB 3.0 was in the interest of not adding more hardware vs just trying to keep it down and promote Thunderbolt. (But assuming Thunderbolt gets a decent support, I don't really care where USB 3.0 goes, although I do see it do well considering its a follow up such a key product. Hopefully Apple will add both with Ivy Bridge)
All that said, OP, I highly suggest the MacBook Pro, Sandy Bridge is great, Thunderbolt beats USB 3.0 for speed(although neither have a huge market, USB 3.0 might win there) The hardware is great, design is great. Sure they might be a few things that could be better, but these laptops are some of Apple finest laptops(even considering the day in which all laptops were made)