While I come to Canon Rumors to learn about interesting technical details from very knowledgable hobbyists I don't object to Ken Rockwell either. I've found his reviews pretty fair.
I personally prefer "The Digital Picture" reviews. I like his formatt of doing things (is it Bryan?).
I've no idea if either of them really know what they are talking about but I find them an interesting read.
I don't know if it's part of being male that comparing things is a natural instinct.
I see it in my son, which is better a Lamborgini or a Ferrari, is Messi better than Ronaldo?
These websites provide this is spades when comparing lens.
What's great about Canonrumors is the depth of knowledge of people like Neuroanatomist and Mt Spokane.
They are doing it for nothing.
I don't object to Ken making some money out of his reviews to feed his growing family (it must be around 20 children at this stage but maybe I've double counted), it's his life work I suppose.