i really don't know why everyone's insisting that it's normal cause it's not. if you're cruising at 3000 rpms in second and you release the gas pedal, it is not supposed to jerk a FEW times. keep in mind that if you're accelerating in any gear, your foot is OFF the clutch pedal so this also has nothing to do with how FAST you realease the clutch pedal because you were never on the clutch.
anywayz... take the car back to the dealer. this is not normal. have the repair it under warranty. after it's fixed, you have ANOTHER warranty for the parts and labor on the repair that "fixed" your problem. it's usually one year from the repair date. if in that new warranty period it does it again... bring it back to the dealer under the warranty, and just keep doing it til they get it right. if they can't, they might just put in a reman tranny for free.
that's how we do it...