This deserves more of an airing. From the Footballoutisders:
The Colts rarely blitz, sending at least five pass-rushers 24 percent of the time (29th) and at least six pass-rushers just 4 percent of the time (31st).
So, yes. The 2009 Colts blitz about twice as much as the 2008 Colts, but they still only rank 29th in the league in blitzing, and 31st in big blitzing. I think the 'Coyer has changed the Colts defense' story is a bit over blown. There are more blitzes, but still relatively few.