"That build is around 2.5 months old. It's the same build that was shown at Gamescom and PAX.
Much has happened since. Physics and graphics have been improved and track riding lines and background have been tuned to perfection. If I remember correctly, that old build still had problems with bike front wheel colliding with the front fender (and causing it to stop spinning). The physics was also a little bit too stiff in that build (it feels more relaxed now). Of course we are still tuning the physics. In Trials HD we tuned physics until the last weeks of the project. So I wouldn't draw any definite conclusions about the game physics until the final version hits the store.
Out of the Pit was the first extreme test track we had in the game. At start of the project bike had so tricky physics and the stones had so low friction that the track was almost impossible to pass. The track was used extensively to tune the physics to be better and better. Now the track is one of the easiest extreme tracks. If you want something more challenging, try Way of the Ninja instead."
I'm happy to wait until early next year. Gives me plenty of time to play other stuff before this takes over!