For reference, here are the raw times for this year’s preps framed against the historical averages from 2000 and later (when available). I also listed the number of superfecta finishers in that time frame as well for each prep.

Florida Derby (average 1:49.4). Maximum Security in 1:48.86.
24.42, 48.98, 1:12.90, 1:36.34, 1:48.86 (split times 24.42, 24:56, 23:92, 23:44, 12:52)
Superfecta finishers of horses running in FLA Derby prior to running in Kentucky Derby since 2000: 6-3-1-3

Santa Anita Derby (average is 1:49.0). Roadster in 1:51.28.
23.34, 47.84, 1:12.20, 1:38.34, 1:51.28 (split times 23.34, 24:50, 24.36, 26.14, 12.94)
Superfecta finishers of horses running in SA Derby prior to running in Kentucky Derby since 2000: 4-2-3-4

Arkansas Derby (average is 1:49.6). Omaha Beach in 1:49.91.
23.08, 47.50, 1:12.46, 1:37.53, 1:49.91 (split times 23.08, 24.42, 24.96, 25.07, 12.38)
Superfecta finishers of horses running in ARK Derby prior to running in Kentucky Derby since 2000: 3-3-5-2

Wood Memorial (average 1:49.9). Tacitus in 1:51.23.
23.62, 46.91, 1:11.46, 1:37.81, 1:51.23 (split times 23.62, 23.29, 24.55, 26.35, 13.42)
Superfecta finishers of horses running in Wood Mem prior to running in Kentucky Derby since 2000: 3-2-1-5

Blue Grass (average is 1:49.9). Vekoma in 1:50.93.
23.26, 47.03, 1:11.55, 1:37.48, 1:50.93 (split times 23.26, 23.77, 24.52, 25.93, 13.45)
Superfecta finishers of horses running in Blue Grass prior to running in Kentucky Derby since 2000: 1-5-3-3

Louisiana Derby (average 1:50.6). By My Standards in 1:49.53.
23.63, 47.68, 1:11.54, 1:36.84, 1:50.93 (split times 23.63, 24.05, 23.86, 25.30, 12.69)
Superfecta finishers of horses running in LA Derby prior to running in Kentucky Derby since 2000: 1-3-4-4

Sunland Derby (average 1:48.8). Cutting Humor in 1:46.94.
22.76, 45.63, 1:09.63, 1:34.76, 1:46.94 (split times 22.67, 22.87, 24.00, 25.13, 12.18)
Superfecta finishers of horses running in SUN Derby prior to running in Kentucky Derby since 2000: 1-1-0-0