Exactly! 65 is just an arbitrary number...let's substitute in 67, that's the arbitrary number I prefer! (example only, I'm very happy with 65!)

But to the original discussion, is there any evidence that shows that 750 hours (or whatever lower number) is as good as or better than 1500 hours. If we're going to pick a number, I'd rather error on the conservative side. If you're arguing that there shouldn't be a number at all, I think you've staked out a losing position!