I don't want to cite Watergate right now but... I can't think of a way to finish this sentence.
But Kotaku isn't The Washington Post. That's the point. In Jaffe's view Kotaku doesn't get the benefit of the doubt. They don't get to originate a story with anonymous sources.
Maybe it's from his personal experience; I know that once in a while I'll see an article in a publication that related directly to my area of expertise and will be 100% bullshit. Though anecdotal, that sort of revelation makes me question the veracity of articles in which I am not an expert in.
To be clear, my experience with Kotaku isn't quite so negative so I don't necessarily agree with him. I do think that quotes from AGDs are mostly useless; there are dev houses out there that GAF has never heard of, and that GAF wouldn't give the time of day to based on output. The context of whose voice I'm reading is necessary if I'm to differentiate between sour grapes and valid complaints. So in that sense I agree with this being termed as tabloid journalism. Just enough information for know-nothings to get outraged (or have their world-view confirmed), but not enough that any meaningful information can be extracted.