Just made a page with 3 Gps tracks from the REM race.
http://www.gruesink.demon.nl/appletGPSAR/gpsar.html
(You must have Java installed in order to see this)

The tracks are :
Matt/Bart: You can see that Matt couldn't use the kite.
Gill/Kathleen: No recordings from the upwind part.
Geert/Karin: Upwind ok till the shackle between bridle and pole came loose and the pole fell in the water. After a emergency repair we went through the first gate then decided to go back, too much risk in losing the pole altogether.

When i'm lookin at the upwind tracks from me and Matt, it'almost boring. Almost same speed and tacking angles. What you can see that we are sailing pretty decent angles, about 95 degrees tacking angles.
Also that Matt had the best start position (pin-end) and about keeping their advantage on us.

Speed was just between 10 and 11 knots. Seems not very impressive, still we were doing well upwind compared to most of the fleet.

Also good to see how much a spi can help; Gill was sailing 33% faster (with kite) than Matt (without kite).

Some instructions: select the tracks you want to follow (ctrl-click) and press the CTR button on the screen. This will play these tracks and keeps them centered on the screen.

More instructions can be found at http://gpsactionreplay.free.fr/