Today I had the summer tires put back on my Roadster (2.5 non-Sport). And boy, did the acceleration ever jump. It seemed to me that it was slower with the snow tires, and I always noticed the tc icon on the dashboard when I floored it, even when there was no slipperiness on the road. I thought the snow tires were supposed to be stickier. But now with the summer tires again, the tc icon is gone and I can feel that old acceleration that I remembered from last summer. So I guess on dry pavement the snow tires don't have as much traction. I suppose I shouldn't be surprised. Racing cars use slicks if the track is dry. I guess snow tires have less rubber on the road, in exchange for the ability to grip on snow.