Federer-Djokovic didn't strike me as a particularly slow match, but it had the 3rd highest time/game of the season thus far.
Karlovic fired out 23 aces in his R2 loss to Mathieu; this didn't make the leaderboard for totals, but is the fourth highest aces/service game of the year.
Cincinnati also saw a record from Montreal equaled; Andy Murray's first match against Almagro saw him go a perfect 26/26 on first serves. Djokovic had a similarly strong show against Ljubicic, taking 35/36 first serve points.
Two matches saw the winner take fewer points; Soderling's loss to Hewitt and Haas' loss to Isner.
Korolev's beat-down of Ginepri in Bangkok is the fourth shortest match of the season thus far. Korolev also had the season's best showing on the second serve return, winning 16 of 17 Ginepri second serve points.
Robin Soderling had the third perfect performance on first serve of the season, winning 19 of 19 points against Brendan Evans.
Two matches saw even numbers of points won, Isner against Wachiramanowong (as Snowwy mentioned) and Beck against Kukushkin, while one saw the winner take fewer points; Bopanna's loss to Fernando Gonzalez.
Karlovic recorded his second 28-ace performance against Serra, though it was a defeat. This match had the same number of service games as Karlovic's previous 28-ace performance, and thus ties it for the most aces/service game this season at 2.33.
Djokovic's double-bagel of Hernych tied for the fifth best performance on return, with DJokovic winning 70.3% of Hernych's service points.
Youzhny and Davydenko split the points equally in the former's semi-final win, while three matches saw the winner take fewer points; Gonzalez against Isner and Chardy against Korolev were narrow differences, but Kohlschreiber won 13 more points than Chiudinelli in a losing effort. The Chardy-Korolev match was notable as it was a straight set match, odd given that the final tiebreak was a 7-1 blowout.
Guillermo Garcia-Lopez came just 1 double fault short of equaling Fernando Verdasco for the overall lead, but the higher-ranked Spaniard should handily extend his lead in the remaining matches.