2011 is getting past it a bit but entirely dependent on how they've been stored. At work we wouldn't test on something that old, but when I bought my car it came with some 11 year old cups which although perished still felt very positive and grippy laterally despite being a little slippery on acceleration.
They'll probably be fine, probably 95%+ as good as a new set. If they're even slightly marked or worse perished, send them straight back. They've probably been in a dark warehouse for 5 years and it's UV that kills them more than anything else.
__________________
5.3 earth circumferences done, roll on number 6...
|