They are definitely skewed, just like all other publications, towards the larger makers. Unless something really stands out, good or bad, (like the CX9 on the good side), they always fudge their results in favor of GM, Toyota, etc, and away from Mazda, etc. with Toyota's foot on their neck, they just couldn't bring themselves to admit the CX9 is a better choice than the Highlander.
That's why I don't read reviews, but go out and look at everything before deciding. Too bad so many buyers don't. Most buy the first one they see.
Dashing Max's comment is also very accurate. Compare any Mazda to it's competitors and there is a distinct difference in the ATTITUDE of their cars.
Zoom zoom