I partially agree with their statement, however the evidence is firmly anti-intel.
I have a highly overclocked 5960x with super tweaked ram and high end NVM-e drives. After the Spectre and meltdown firmware and software patches came out, my system is horrifically and inconsistently stuttery and laggy just opening folders, launching applications, etc.
I have been able to run no benchmarks to show this newfound lack of snappiness - before the SHTF, it was magically fast and responsive. Almost as if the computer started doing what you asked before you even asked for it.
Given I can't prove any of this via benchmarks but it's incredibly obvious from a user experience standpoint, I think it would be a great idea for reviewers to include a section about user experience. However, I do not agree this should replace benchmarks, but compliment them.