For benchmark numbers I trust Anand over Tom without a doubt. Compare both of their numbers, and this goes for anything not just this particular review, to what actual end users are getting with the same setups. I don't know what Tom does, but his benches are regularly comical in how different they are from every other site.
For commentary I don't trust any of the review sites be it because of the level ot technical expertise or the fairly extreme bias on those sites that don't suffer from the former. Digit-Life is likely the best overall for vid card reviews, but mainly because they are the most detailed without bending over backwards to perform PR for one company or another.