Zwift did an update before my ride last night (12/27/14). I was attempting to get a better time for the Holiday 40k challenge, but it looks like the metrics were change to reflect a more accurate correlation between power, speed, and elevation.
Anyone else notice this change? Can someone at Zwift confirm this?
This is great news for accuracy, but bad news for anyone trying to “win” the Holiday 40k Challenge because results before this update are much faster!