I hate to sound stupid but did something happen, fork maybe? Pool http://digitalcoin.scryptmining.com/ went from steady block every 1-2mins to average 6 mins per block over an hour. Seems to be approaching statistical improbability. Roughly 17% of network hash with 20sec blocks means approx 30 blocks per hour. So at 10 blocks in an hour that is really low. Additionally I am sure the 20 sec block rate is being way over driven based on high hash and difficulty not yet adjusting. Also starting to see orphans as well. Mathematically this seems really odd to me