Where did you hear that?

I agree that the switchback still has less vibration, although the dren doesn't exactly bounce out of your hands. Still very quiet and very low shock.

I think that YOU CAN be just as accurate with a dren, however, I think that it may well be more difficult to be AS accurate with. Just like a change in brace height or a little cant on the bow. In archery, everything isgive and take, and cause and effect. Gain a little speed, lose a little stealth. Lose a little forgiveness in brace height, gain a little speed. Gain forgiveness with longer axel toaxel, lose a little manueverability.