I just had my 1st skate in a pickup game last night with the Carbon Pro Hockey insoles. I had been using the Yellows for the past few months and really liked them. In comparing to the new Carbon Pros, the first thing I noticed is that they were more comfortable than the Yellows. Not sure if this is due to the slightly less volume and/or better cushioning? Maybe Sean can comment on the reason for this.
Second thing I noticed was a very noticeable improvement in skating possibly due to better edge control. As for speed and/or acceleration versus the Yellows, it was at least as good if not better. Just for reference, I am around 170 pounds with flat feet and use Bauer Vapor 160 skates. In summary, I felt a significant improvement in skating and comfort switching from Yellows to Carbon Pros. Your mileage may vary but I absolutely love them!