A potentially interesting fact about the database of Board of Patent Appeals & Interferences decisions available on Westlaw:

From 4/30/2007 (i.e., the date KSR issued) to now (which is 269 days), the phrase “common sense” appeared at least once in 233 BPAI opinions.

In the 269 days ending 4/29/2007 (the day before KSR), the phrase “common sense” appeared at least once in 58 BPAI opinions.  (That’s a 364% increase.)

Coincidence?  Hard to say …