What age to kittens lose their baby fluff?

[Debsymiller (Rufus' mum)]

Well I'm enjoying it while it lasts as he doesn't seem to shed very much fur at all! Unlike the other two, I'm brushing Layla about 3 times a day at the mo and yet she only has to look at me and I'm covered in fur! hehe

[Angeladeedah]

I think Ollie had lost his by about 3 - 4 months but Harvey took a bit longer and was probably more like  5 - 6 months. 

[Tiggy's Mum]

I think the boys were around 5/6 months when their fur started to look more cat like than kitten like.  LuLu was like a baby bengal, very fuzzy, now he's Mr smooth and shiny 

[Debsymiller (Rufus' mum)]

I remember Oscar having the same fluffy hair (that sticks up on end) as Rufus does but can't quite seem to remember when he lost it and got his sleeker coat. Does anyone else know when it tends to happen or is it different for each cat?
Not that I'm in any hurry for his coat to smooth out as he looks very cute but OH and I were chatting about it last night and neither of us can remember.