So here are the results for the last 5 postseasons, using my primitive method, which was to see how many games were won/lost by the team with the better regular season record. And if the teams had identical regular season records I ignored those games.
2016 21-13
2017 23-15
2018 24-9
2019 22-15
2020 32-21
Total 122-73 .626
I was a little surprised by how strong those numbers were.
At the same time I can see that if you go back further, things were not as skewed.
Maybe it's a short-term trend. Interesting, though.