Re: Maybe, just maybe..
"One think I always wondered about though - if you mix the cube in say, 10 turns, then surely the fastest solve is 10 turns?"
Definitely not. All it shows is that there is a way to solve it in ten turns. Suppose that you scramble it five times and unscramble five times, for example. You have a solved cube at the end, so the solution is 0 turns.
To see another reason why such thinking has to be wrong, mix the cube for, instead of ten turns, a million. It is never going to need a million turns to solve it then.