2.2 released yet? or is it still in development?
2.2 has been out for awhile now; there should be a link on the first page of this thread. I can confirm that it does give ~10% boost when mining DNR.

There is no link in the first post.
THE 2.2 CCMINER VERSION IS A DEVELOPER'S SNAPSHOT--
It is not yet a pre-release on GitHub. You will find a few links to it in the BCT threads, at least one is on Signatum (SIGT) thread. I believe that the link on the first page of the SIGT thread for the "nVidia GPU miner" is a contribution from Epsylon3, but it does not reside on his GitHub. Epsylon3 has published links to his preview folder in at least one BCT thread.
Seek and Ye shall find. --scryptr
Yes, found one on another board.
But:
It is 10 % faster indeed. It shows that in the miner itself, but my average hashrate on my pool is even a bit lower than before. Dunno why.
THE COMPUTATION ALGORITHM IS DIFFERENT--
A miner calculates hash rate by counting the hash cycles that it performs. The pool estimates hash rate by counting shares received. There is also signal latency involved (ping time) in the error.
Are some pools crooked? I think so, and avoid them. To make your decision about any pool's hash rate accuracy, look at the reported rate over time. At times my hash rate is reported 10% higher (on most pools) than my local rate. So, error works both ways on an honest pool. --scryptr