Although, to be fair, I am among that 45 percent. Sort of.
The rewards/dividend card I use for everyday shopping gets paid off every two weeks. The only card balance I currently carry is at zero percent thru October, and every cent of that money is resting comfortably in my ING Direct account, earning 3 percent annual interest. So, if surveyed, I guess I'd have to answer that yes, I make only minimum payments on that amount.
But something tells me that most of the 45 percent named in the survey above aren't doing it for the same reason I am.