Ah, not really. When you stand on the pegs, the COG raises but the mass of the rider is bearing lower on the bike. This means the bike is significantly more 'tossable'. The difference in a light bike, is enormous.
Try it on a lighter bike - say one weighing 350 lbs or less. Try quickly changing the bike along the longitudinal axis. Now stand with your ass slightly above the seat and do it again. You will see a difference for sure.
The difference on a battleship bike will be less because the rider's weight is less a percentage than on a lighter bike. You will find that trials bikes have no real saddle because in that sort of event, you need a good deal of bike English (tossing).
Why be born again when you can just grow up?