Bah... sorry to reply again so quick; not trying to spam the forums or anything. I meant to add this as an addendum to my post, but the 15 minutes had run out...
There's also no accounting in that article for the "Sore Loser" type. Sore Losers are competitive and do play to win - they'll issue rematch after rematch to try and prove they can win. They just cannot handle defeat, at all. Instead of just admitting they were beaten by a more skilled player, or played poorly themselves, they make all kinds of excuses... they had lag, their controls were sticking, the sun got in their eyes, someone/something distracted them... anything but "wow, I tried my hardest but you were better".
In that context, I could well see the article's example of someone saying "throwing is cheap" as a sore-loser's way out of accepting defeat.
In MMOs, some will go as far as blaming the class of the person who beat them as "overpowered", despite mountains of evidence to the contrary.
In any case, that's another shade of grey that I think further shows the whole "competitive" versus "scrub" mentality oversimplifies the whole thing.