Not sure what to make of the "wrath of wouter" exactly, but having sailed with both the Ullman sails and the Glaser sails I can attest that the Glaser sails (= Alter cup boats)are alot more firm in the leach and do pickup speed in the puffs better. I am really impressed by the Glaser sails. We too thought the Ullman mainsail was a bit flappy up top, probably just what you want for 1-up sailing but not to attractive in 2-up sailing.

Wouter