Oh, and as for no one enforcing the rules, it's probably because nobody has the cojones to actually default a top player for such a trivial thing as breaking the rules. They will warn them, but they never seem to take the next step and award a point to the opponent for continued stalling.
So, even though they are taking that first step (with a warning here and there), they haven't shown they have the strength to take it to it's ultimate conclusion, defaulting a top player for taking too much time between points.