It is data, you're right. It's anecdotal evidence, and should only be used as a burden of proof if there is no other substantial evidence.
Tell me, If I go to the SimCity forums will I see hundreds of people complaining about a game that doesn't work? If I go to YouTube will I see videos of buggy behavior and reviewers irate about the state of the game?
That too, is anecdotal evidence. But, since you're only worried about data, I guess the larger amount wins out. So, clearly, the data indicates the game has issues.