I read that article to mean PL/HW got the best rate only about 55% of the time! Perhaps I misread it, I don't have it in front of me.
I also read it so say that between opaque sites, PL was best only about 2/3rds of the time. It surprised me to learn that HW beat PL ever. I have not had that experience. Some clueless CR editors is more plausible.
Interestingly, they did not mention the importance of sites like BFT.