Scott is right on this one... big kite == drag. Small kite and big board will go upwind better in most cases, within reason.

However, I still believe a big and efficient foil and a >good< 130x41 *may* beat the 9m + glide.

That said there have been many many many times when Scott went half a mile upwind of me on his 9m waroo while I was on my 16M waroo in light wind. We were both on the same board. I pretty frustrating because I knew it was because I was on a big kite... lightwind efficiency defeated by drag.