I am concidering buying a Santa Cruz Heckler.I was on my buddies the other day and blown away by the rapid acceleration I got on this bike. He has the 5th element air shock and keeps it pretty hard. Any Heckler owners getting more acceleration from this bike than others riden? Is it the rear shock? My buddie is in no better riding shape than the people he rides with yet blows us away with a burst anytime he wants. He thinks it's the rigidity of the Heckler frame. What do ya think???