I've taken the Yeti out a few times to the local Cobb County ABA BMX track to see how she'd stack up. Initially I received strange looks from the locals. Like, "Is that a mountain bike?" or "Hey, where's your BMX'er dude?" After a few rides though, they warmed up to the idea of an extra-large cruiser. A few of the riders get spooked by the gear shifting on the front straight, but no real complaints so far.
The Yeti provides the perfect balance of lightweight and stiffness needed to get out of the gate quickly and rail the berms. Surprisingly, for quite a few motos now I'm first out of the gate. Not bad considering I have ~5-10lbs of extra bike and haven't really raced in over 10 years.
If you have a 4X/DS bike, get out to your local track and give racing a go. Who knows, they may eventually add a special class for us extra-large cruisers.