My dd 8.4 has only lost four teeth! She has a very small jaw, but large gob and that will cause her problems in about 6 months according to her delightful dentist - aka Mr show me the money Swede. Tooth fairy was a hit until JoJo told her that it's your mum who gives the money. don't you just love parents who don't lie to children?
My ds1 seems to be getting his second teeth unusually early - his two bottom front teeth started coming through when he was only 4 (and he looked like jaws for a while, with baby teeth still in situ at the same time for a couple of months) and two bottom back molars shortly after his 5th birthday. A recent trip to the dentist revealed 3 more loose teeth, I think all at the top, indicating the imminent arrival of yet more teeth, and he's only 5 and a half. She did agree this is really very early, though, particularly for a boy - girls tend to get their teeth through a bit earlier than boys, apparently. Most children have started getting 2nd teeth through by the age of 6, though.