I'm beginning to notice an interesting trend with myself as a rider. I start very poor but grow stronger as the ride continues. It seems like I don't hit my stride until about 35 minutes into the ride. It's really strange. I tore up the hills today. Absolutely crushed them. I never even dropped into the smaller sprocket and found myself passing every rider in the group. I'm still not fast enough for the 'A' group, but I'm turning out to be one of the stronger riders in the 'C' group. No such thing as a 'B' group with these guys.