It's hard to tell how much they're loosing downwind without the jib...but NZ is in some big breeze and the lack of a jib hasn't cost them anything yet. NZ running at over 38 knots while LR is running in the low 30's.

NZ is still foiling all the way through their gybes and making 5 knots better than LR. I hope Oracle has something for this...NZ sure looks good....and I'm wondering if we'll see jibs in the future.