Hmmm I thrash my wee civic vti and the front tyres are now 2 years old and look fine (Dunlops). I thinkshe must have sporty/soft tyres which do wear faster or those tyres are just simply bad (I think the latter).

Not being rude but why would BMW change the tyres for free? Its not a new car, not on original tyres and not BMW's fault the tyre is poor.