Now, I don't make this post as someone who (a) wants to defend Polygon or (b) someone who bought and is attempting to play SimCity.
However, I'll put it this way. With reviewing(games (or movies, books, media, products, etc.) in general, the whole concept of doing so is very subjective. It's about your experience with the game/thing.
We could talk about the fact that (according to what I heard on the Joystiq podcast last week) EA forced people who were to have a review ready before release to play it on their terms with private servers and whatnot, but that's not what this is entirely about, to me at least. It's certainly part of it though.
What I expect out of a game is that person's opinion of the game. I don't go through reviews looking for validation of my own thoughts, I want some thoughtful insight on the games that I'm on the fence about or just don't care about. I listen to the reviewers who I have paid a lot of attention to, whose tastes seem to align to my own, and weigh their experiences and thoughts to figure out whether or not a borderline game is something I should actually pick up.
In the case of Pitts writing about SimCity, I wish they didn't compromise their rating. He disclosed that this was on private servers, and people should understand that they would not be playing under the same conditions. The simple fact is that if people could actually play this game, they would probably find that it's pretty good. Most people would, anyway. They'd agree (or mostly agree) with the 9.5 score, and it would be "justified".
In the case of Mass Effect 3, the "anti-consumer" aspects of the game didn't affect me at all. And I did play multiplayer to get that stupid readiness waiting up. But I never had to spend a dime on the microtransactions to get the "best" ending. The Bombcast people who have played DS3 have said they wouldn't have even noticed the microtransactions in the game if it weren't for the hoopla about it.
Clearly in the case of SimCity, the DRM completely screwed the game. But Russ's score should stand. He reviewed the game. And absolutely, there should've been an update/caveat placed on the review once it hit and the servers failed and whatnot. But the score should stand. He reviewed the game, gave it a score. Now all they've done is compromised their system.
The fact is, if the DRM worked as designed, there wouldn't be an issue. Yet they don't have enough servers to get the game out there, let alone run all of the resources on it, yeah, that really sucks. Surprise, surprise, EA is a moneygrubbing dirtbag who isn't known for their quality in the first place, let alone customer satisfaction or consumers rights. But game reviewing should be about reviewing the game. Game journalism should talk about the mechanics behind the games and the people making them. This is like writing a paragraph about the stupid pre-teens on XBox Live in every multiplayer game review. I know those kids exist, and I never have to hear them if I don't want to. But that has no place in the review. And if you're too stupid to know about the DRM before reading the review and you buy the game off of a glowing review in "ideal conditions" and you didn't see this coming after the Diablo 3 fiasco, well, you deserve to have your $60 taken for supporting such douchebaggery from EA.
TL;DR - The score should stand, but the DRM should be talked about in a separate piece. Don't shoot the messenger, shoot EA. Or be pissed at yourself for buying a game you figured would be broken out of the box. The fake, digital box. From origin. Which you hated in the first place.