Plenty of players go over the time limit, which is much shorter than what it should be, anyway. They only care when it's Nadal. It's absurd. At 1992 Wimbledon, Seles was getting criticised heavily for grunting, while Agassi was grunting away on the men's side without any criticism. The aim of such criticisms are clear, to rattle Nadal, masked up as "enforcing the rules".
Have you got any stats to back it up? (plenty of players etc.)
Why should time limit be shorter? Many players can cope with it.
Reality is that rules should be enforced.
Clearly, Nadal style of play benefits from longer breaks between points and therefore disadvantages his opponent.
Why should opponents be disadvantaged because Nadal abuses the rules and officials do nothing to stop it?
As many people said, we should have a clock on court displaying the time limit and constant abuse should be penalised with points awarded to opponents.