Stuart:

The bar moves quicker if there is more than one player on the carrier during the CTC. The more players that have landed on the carrier the faster the bar will move.

The more people land on a carrier the quicker it is captured.
Ie one on one carrier two on the other will be twice as fast.

Edit..beaten to it

WHAT!?!? THEIR MOVING THE BAR??? WHERE TO? I always stop in for a drink when I land on the carriers

Ya! but if the bar can move we can stick some perpellarz and wings on it so we can grab some hams beer Right there in the sky!
.....(update idea!)