I don't think it's a "roll jibe" per se. They're jibing around the weather mark - the crew is not in the same position as when you're jibing from broad reach to broad reach.
This is not something I would want to do (especially on a 16) in any kind of breeze. You'll end up with the boat on top of you.
Yes you are probably right Matt.For sure they are gybing around the weather mark,these series of pictures is of Cam Owen(third at the worlds) and Sue Ferris (Singapore National Sailing coach).They are executing a gybe almost exactly like what you do on a laser and I know the dynamics of the boat are different,but it does look some what impressive.When I talked with one of of the guys I know from Aust. he says they are always experimenting with ways of making the 16 sail faster around the course.
Actually a lot of things that we do to sail the boat around the course fast involve sailing on the edge,i.e roll tacking,sitting as far forward as possible downwind..