Sort of yes, and sort of no. He's able to point out glaring flaws in any game, but he also has incredibly high standards.
These standards ARE nessicary, mind you, and they help us appriciate what is TRULY good in the games we play. Heck, hearing his oppinion on Halo made me re-think my own.
I've had people come up to me and tell me how 'Halo's story is amazing!', and immidiately think, "Are you nuts?"
Halo, in my oppinion, is a fun game nonetheless. The weapons are balanced and fun to use, the asthetic choices appeal to the eye and are decidedly non-brown, and its a great game to socialize with. (Seriously, I made some of my best friends over games of Halo 2 at my local church.)
Getting back to Yhatzee....if I listened to his reviews as to wiether or not I buy a game, I'd...never buy any games. Heck, I have my fair share of games that I loved, that the 'world' didn't. Rayman 3....Final Fantasy XIII.....you get the idea.
Basically, one should use reviews as a guideline, but not a final verdict. If YOU'RE having fun with a game, then it shouldn't matter what other people think. Thats your personal decision.
As for Yhatzee, he's an intelligent man, who knows what he's talking about, but at the same time, he's a cynic.