True, the buffer will mask the write perfomance but you'll notice if you fill the buffers and have to wait for them to clear, especially if you're shooting RAW mode. High speed flash cards also make for much quicker picture playback IMO. I've go the 10D with the 1GB Sandisk Extreme II. Using that card in my older Canon S30 turns it into an entirely different camera. I bought it after revieiwing the site you linked to; that's a great resource.

-Zeke