Actually, saying that Tom is known for aberrant scoring is fair. Tom doesn't use the 60-90 scale almost everyone else uses, and that makes him "aberrant".
My problem with the article, and the reason why I think Tom was defensive about that phrase, is not that phrase in itself, but the context in which it appears. Let me put both paragraphs here:
"'The problem is the scale,' said Obsidian’s Urquhart. 'There's an expectation that a good game is between 80 and 90. If a good game is between 80 and 90, and let's say an average game is gonna maybe get 50 scores, if you
wanna hit that 85 and someone gives you a 35, that just took ten 90s down to 85... Just math-wise, how do you deal with that? Some guy who wants to make a name for himself can absolutely screw the numbers.'
One reviewer well-known for aberrant scores is Tom Chick, who runs the blog Quarter To Three. Chick is listed for having the lowest Metacritic score on BioShock Infinite (a 60) and Halo 4 (a 20), among others. He uses a 1-5 scale that Metacritic converts into multiples of 20, so Chick’s 'I liked this game,'–3 out of 5–is converted into a 60, which most Metacritic readers see as a bad score."
Now, the last phrase before the mention to Tom Chick says "Some guy who wants to make a name for himself can absolutely screw the numbers". And then Tom Chick is introduced as someone who "screws the numbers". That phrase, howerver, leaves a lingering implication that he's also someone who "wants to make a name for himself". And that's what sounds offensive to Tom, and that's why he acted defensively.
So, it's not the text or the article, but the placement and the context of that phrase. People who know Tom will not draw upon that implication - that he wants to make a name for himself - but people who don't know Tom, or only read his scores, and not his reviews, will be tricked into that implication. I'd say that's unfair.