I remember vividly the first time card speed became a bother. It was when I was shooting Nate and Ashley’s engagement photos. I had just gotten back from traveling and was so tired. I was quickly shooting frame after frame, because the sun light was disappearing fast. I was using san disk extreme II 4 gig cards and the camera would seemingly lock up and not let me take more pictures because it was slowly writing to the card. My new camera came with an extreme III 8gig card and gives me the same lag as the 20d did with the extreme II cards.
JIM baker
p.s no I’m not avoiding my own 5 sentences, I’m still thinking, thanks for all the responses, if you haven’t checked out the conversation you should do so here.