I tracked many different outlets and the PS4 outsold the Xbox One at each one. Thats how I correctly predicted that PS4 would beat Switch last month even though earlier I had said it would be Switch. Its because I actually observed. Going by last year the Xbox One should have beat switch in November. But looking at the retailer charts you could see the opposite.
Everybody correctly predicted that PS4 would beat Switch in November so your "observation" is merely a coincidence.
When the herd loses its way, the shepard must kill the bull that leads them astray.