@dlowan,
hmm, the first folks i can remember saying it were french canadian, so i assumed it was a cultural thing, now it seems to be across the cultural spectrum but only in selected areas
the other night a news reader (canada) said it and she was probably a kid in the 80's, i wonder what determined who said "sleeps" and who didn't, could it be a commonwealth thing, we have some canadians and an australian who know of it, but two americans are not aware