1. Prosumer/enthusiasts who are somewhat technical, but mostly excitement
2. People who have professional level skills and also enjoy writing about it
3. Companies who write things because they sell things
A lot of sites are in category 1 - mostly excitement/enthusiasm, and feels.
Anandtech, TechReport, and to some extent Arstechnica (specially John Siracusa's OS X reviews) are the rare category 2.
Category 3 are things like the Puget Systems blog where they benchmark hardware, but also sell it, and it functions more as a buyer information.
The problem is that category 2 is that they can fairly easily get jobs in industry that pay way more than writing for a website. I'd imagine that when Anand joined Apple, this was likely the case, and if so that makes total sense.
It's a shame that I can't even find a publication that runs and publishes the SPEC benchmarks on new core designs now that he is gone, despite SPEC having been the gold standard of performance comparison between dissimilar cores for decades.
I wouldn't put much trust in well-known benchmark suites as in many cases proprietary compilers, a huge amount of effort was put into Goodhart's law optimizing to the exact needs of the benchmark.