I don't hear a whine when I'm accelerating under boost (unless I really hit it), but I do hear the (i assume it's a) generator whenever it's charging, especially at low speeds when there's less road noise. Of course you can feel when the regen kicks in too.

I did a lot of driving the other day and got my battery fully charged enough that when I hit the brake regen didn't kick on. boy that was weird- actually using brakes! you don't realize how much you get used to the regen slowing the vehicle.

sorry! off topic. I do get more rollback than my automatic explorer, but not enough for me to feel the need to 2 foot it or use the handbrake. usually just a few inches before the car goes forward again.

KLC
2005 HCH CVT 'Verdigeek'