[Lil' Lavery]

The red alliance's success stems from a much more likely source, the fact that during the elimination rounds, the higher seeded alliance is playing on the red side.
During the 1 vs 8 quarterfinal matches, 1 is on red, 8 is on blue.
During the 2 vs 7 quarterfinal, 2 is red, 7 is blue.
During the 1/8 vs 4/5 semi-final, the 1/8 winner is on red, the 4/5 winner is on blue.
Etc.

The higher seeded alliances apparently were just the better alliances during the elimination rounds in Colorado.