Okay, I got two PMs, one each from Karen and cassiesmom. I don't know who sent theirs first. So - you can decide between the two of you who hosts the next puzzle!

The answer, as you said, was: "People who say they sleep like a baby usually don't have one. Leo Burke"

And Karen, I think Leo was referring to people without babies - as you said, the parents of a new baby are often sleep-deprived.