ripdog:
That's a reasonable guess, vulcannz, but modern browsers load both v4 and v6 versions of a website simultaneously, and display the one which connects first. This is explicitly to prevent broken v6 from breaking the web.
I'm not saying OP shouldn't try it, but it's fairly unlikely.
That's the theory... in practice the Windows IPv6 stack is pretty shonky, between the OS and browsers things can go very wrong.