That got me curious enough to count the average length of points in the third set, which Sampras won 7-6 (7-0). I did the same for the third set at their '99 W final (which Sampras won 7-5) and the third set of their '01 USO quarterfinal (also won by Sampras, 7-6).
1999 - average point lasted 2.85 hits
2000 - 3.12
2001 - 3.25
Impressive work. I know I'll never get around to it, but I'm curious to see this stat on some other big matches over the years(Lendl-Wilander, Nadal-Federer, etc)