Just took a test ride on my newly installed Super Record 11 using a Chorus 11-25 cassette. I don't have any complaints. Maybe I'm prejudiced since I've been riding Record 10 for the last 6 years (btw, it's not worn out, just going on another bike for my son. It's only got 45,000 miles on it). The new cassette design really does shift quickly too! Now I'm going to REALLY have a hard time trying to make my friends' Shimano and SRAM systems shift as nicely as mine! Of course, I did used to own a Campy Pro Shop, I know how to set Campy up.
Remember, there's more to making things work correctly than just bolting the components on. The derailleur hanger has to be straight and true, limits adjusted properly, cables need to be clean and free traveling, etc.
I can't count how many times I've had to correct the work done by bike shops AND Shimano neutral support. (Remember Mara Abbot's issue at the 2013 National Championships in TN where they broke her derailleur off trying to change her rear wheel?)
Installed this cassette on a HED JET 6 FR rear wheel. No issues. In this case it was bolt it and go!