What are you running and how are you distrubuting it. When I was evaluating the 20V it was capable of a great wake with 1600 #'s, wake plate all the down for getting on plane and then would run at about 4 or 5. Virually none of the weight was in the rear lockers. Running about 600 in the bow (needs 800-1k) and 4-500 on each side but mostly under the rear seats and extending a little bit into the rear lockers.
You could also see how Bill J (on this board) is running his 20V, I know he's pretty happy with it.