well i can deal with that for 2 reasons:
1) Pro has always been a name for each VS before this one, like Visual Studio 2008 Pro.
2) they merged a bunch of stuff so that we do not have 27 versions -- Pro now has the stuff that was in 05 and 08 split into like 4 different versions (Test, Arch, Database and whatever)
so we get a simpler set of names and a better set of features in one simple name.