Agassi and Sampras hit flat and take the ball early. Thus a very quick match and we know who wins those battles between Sampras and Agassi. Sampras always does due to Agassi's style hitting to Sampras's wheelhouse. Nadal would be the perfect player to hurt Sampras's rhythm and attack his backhand. Btw I never said the courts weren't lower bouncing in the 90's They used a softer grass which caused the ball to die quicker. Thus the perception that the court is faster. The break percentage shows that the horizontal speed did not change much. Actually there are less breaks now.
If you had the chance to give Nadal some, would you? Because honestly, the amount of sucking up you do to him, geez.
ITF measures the US Open and the Australian Open Courts faster than Wimbledon on their scale. I'd say they are more accurate than a tennis arm chair critic that doesn't even play tennis at all.