Depends on the market, some have unused portions of 5, some have 10 and some have 15. On average I'd say 10. There are a few markets that are pretty spectrum constrained, like Chicago where they have 5mhz total (already in use at least partially by their 1xevdo cdma).
I'm not sure if they own any in Cleveland. I know they do own 15mhz in Seattle but don't have anything built there yet.
