I don't know what class he won but the Pro class and Outright was won by Aussie Josh Strang who's won the first 3 rounds.
Yeah, I wondered that, particularly when the TSM article says:
Former World Enduro and US GNCC Pro Champion Shane Watts scored a sensational Overall victory, riding his KTM 200XCW in the hotly contested morning race at Round 3 of the 2010 GNCC series, held in perfect conditions near Morganton, NC on March 21.
Looking at this:
http://www.racer-results.net/results/gncc/2010/class_list.asp?r=3Watts won the morning (and is a "Sportsman"), Strang won the afternoon (as a "Pro") - and while they both did five laps, Strang would have only just finished in the top 30 of the morning race - so obviously the run different courses.
Also, I find it funny that Watts is doing the whole "thank your sponsor" thing, and generally not sounding like the old Shane Watts.