Just shooting from the hip I would have to say VZW. AT&T and VZW are the two largest carriers in the US, but AT&T has the iPhone that they push very hard. VZW actually seems to push the BB's alot harder, and there really isn't another phone offered by VZW to compare to a BB. Like I said tho, I haven't looked for any stats to back up my claim.
I just want a honest weeks pay, for a honest days work - Steve Martin.