Yes - I am sure that LC has pinpointed the intended AB style and that downsizing is not expected.
LOL - the lifesaver guys are indeed trying to get the cumbersome surfboat out through the powerful rollers, as fast and as straight as they can. It is not easy for each rower to make an accurate stroke with a long heavy oar at this point and he therefore needs to be 'glued' to his seat for maximum stability, which can be achieved through the skin of a bare butt better than the fabric of his speedo; hence the hike of the suit (which is usually released to normal fit on return to the beach after a race).
These pre-launch preparations can often be spotted on location videos
(Chris Geary at Bondi perhaps ? - I must check).