Philip Bloom recently posted part 1 of his admittedly unscientific "Xmas 2011" camera shootout, pitting a hacked GH2 against some pretty stiff competition, including the Sony F3 & FS100, Canon C300 & 7D, and others.
The bottom line is the GH2 comes out of this shootout with its head held high, um, er, well, with at least its flash hot shoe held high, or something! :-)
P.S.: I wish Phil had a Sony A65 to include in his tests, too. John Frey has posted some nice comments about that cam here on CreativeCOW. Maybe next time. And of course, some of the much more expensive camcorders in Phil's shootout have obvious advantages in specific cases (such as XLR audio connectors, headphone jacks, 10-bit 4:2:2 live outputs, etc.). As always, use whatever tool which best matches the task at hand & the client's budget. Cheers!