Its hard to define who a diver is and whose not(unless its a clear case ala Drogba and Cristiano), and we could debate all day about it and not get anywhere, because theres no way for someone to prove the other wrong, but my impression about Torres is that he does tend to fall to ground on the slightest contact at times, and he does try to con the referee and make a meal out of challenges ala your typical Spanish player.
