I'm 15, and if you're in England (like moi) I think you're gonna be confused until you see it on the shelf.
I've seen PEGI slap an 18 on it and the BBFC a 15, and I've seen both versions of the pre-order box in different shops (GAME had the BBFC whilst HMV had PEGI), plus I don't think all games are definitely using the PEGI system quite yet. So hold out for hope.
It's exceptionally annoying, and all it does is piss off gamers (our age at least) whilst the retard parents still by 5 year olds GTA and CoD anyway.
I realise the hypocrisy, but at the age of 15 there's nothing I don't know or haven't seen that's going to affect me in the slightest. The difference between someone 15 and someone 18 is virtually non-existent (in terms of brain function/capacity/whatever).
Ditch the 18+ rating I say, just give everything a 15+ and be done with it; not like Australia, just everything that would get an 18 make it a 15.