Glenns shirt reminds me of the daggerboards Bill Vining made for his A-cat.. Perhaps he has been lurking around here, or Bill is really good at predicting fashion <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />

If you look at the draft when going upwind, he has probably pulled on quite some downhaul to flatten the top of the sail. Not much twist in the sail..
To me it looks like the mast is rotated more like 110deg, but less (90?) in stronger winds.