Further, I'm basing my opinion on a number of benchmarks and power measurements besides just HPL. I just favor that because it's one of the few that push a CPU hard, fills system memory, and can't easily be gamed/made irrelevant with new architecture.
The main point of my blog post is to say this is the first Intel chip that's even punched in the same weight class as any Apple Silicon, wrt efficiency. It quite surprised me.