Liebling is 5 and hasn't yet - but his cousin had lost one or two before her 6th birthday. I did talk to a five-year-old who had a couple of gaps a few years back too. (She may have had a big tooth or two as well, can't really remember.)

I remember losing one just after I turned 7, so I think maybe I was late? Or maybe that was a last tooth. I also remember getting cross that my mother lied to me about a tooth fairy and testing for tooth fairy truth by not telling her when I lost a tooth.