Wow. Ok, I guess I shouldn't really be surprised at how spectacularly poorly this article would be received here, but are you all just that bad at reading comprehension? Or is it simply, and more likely, that over half of you didn't bother to actually read the study in question, or even the OP's summary of it?
First off, to the few people still chanting "correlation does not prove causation": yes, we know, they know, they explicitly said that, thanks for identifying yourself as a perfect example of a gamer with attention problems. Moving on...
Slightly less obvious, but still baffling, is how so many people are reducing the conclusion of the study to "kids are bored by boring stuff and interested by games, DURHURR!" That is not what the study says. No, it's not. Read it again: it says compared to non-gamers, kids who play for over 2 hours a day have an increased tendency to have attention problems. The comparison is the key point, the entire reason for the study to exist. Of course kids aren't going to be as interested in school as they are in playing games; games are designed to be fun, that is their purpose, whereas teachers struggle (sometimes successfully) with making school fun, or at least tolerable.
Lastly, 67% is a huge correlation factor for a sociological study. Trends with correlations of 30% are still taken seriously, that's just a matter of fact when dealing with random human populations. I know this to be true because my mother is a social worker, and I used to laugh whenever I'd read a correlation factor in some journal article she'd read, because (as a chemist) I'm used to seeing R-squared values of 0.95 and greater.
I believe that, as a community, we've all become so accustomed to rejecting any claims that gaming may have any negative effects on children (or society in general) that we'll brush off any seemingly legitimate concerns as propaganda meant to destroy our hobby. Really, what was the take-home message from this study? That children shouldn't play more than 2 hours of games a day. Is that really so apocalyptic that we can't even consider that there might be some legitimacy to this study?
We've all turned into fanbois for gaming, blindly defending the hobby at the drop of a hat without even realizing what we're defending it from.