I think a lot of people are being sensitive about oddball Zelda critiques because a lot of the Wii's future rides on how well Twilight Princess is received. If a bunch of prospective buyers hear that the bestest launch Wii game isn't so great, it might scare them away from the system entirely, and then Nintendo fans like me run the risk of not seeing another Nintendo console. Yeah, it's THAT dramatic.
Granted, I doubt that Joe Consumer puts much stock in internet game reviews, but hyper-critical reviews that obsess on something like voice acting (Miyamoto has only stated a thousand times that he doesn't want any voice acting in a Zelda game) could potentially rob from the game's positive buzz. Another irritant is seeing a Zelda game being ranked lower than what is essentially a polished rank-and-file FPS.