What bru said...
All the additional rotating mass of the AWD system means you can get a *lot* of bucking going on if you're not smooth w/ the clutch. Just driving around in 1st gear, can actually really get rough if you let off the throttle too quickly.
What really helped me (my WRX was the 1st 5-speed I've owned as well) was sitting in an empty parking lot at idle, then letting the clutch out till the car started to creep forward. Once you get used to the contact point, you should be able to let the pedal out to that point quickly, then wait there while everything syncs, then let it out all the way. After a while it becomes second nature... but don't let Deede hear me say that, since she thinks I suck at being smooth w/ the clutch.
