My stumpy does a good job cancelling out the pedal bob, i know its still there, but i remain seated in alot more situations, and i conserve energy. A good quality FS will be able to cancel out alot of pedal bob, the fox shocks now come with pro pedal dampeing which helps even more. I say i use less enegry riding my FS than i did riding my hardtail, although i do sometimes miss the HD on a really long climb..but the downhill after with the FS makes me forget all that..