Don't know about the extent to which it'd make a difference, but on instagram they were saying that the velodrome was ~7*C colder than when the aussies broke their TP record.
I remember reading somewhere (probably in relation to the hour records) that it's about 1.5w more watts required per 1 degree reduction to cycle at 30mph.
Would changing velodrome conditions have that much impact?
Did enough to win clearly!