I test rode a few a few months ago. Pig is an understatement, but they made up for it in a few places. Ungodly amounts of traction, and float for days. If you ride sloppy soft junk or loose material these will beat a 2.1-2.5 all day every day.
Where they suffer is weight, climbability, and agility, all 3 are key here in New England.
I ended up sticking to a 26-er. You can't be a 26 in terms of tight singletrack agility, though I'm itching to slap some 2.5 maxxis minions on it.
2007 2dr X, 6sp, 35's on D44's, 2" lift, cage, hydro, etc.