Well, honestly, if you make a statement like that, these reactions are what's to be expected really. Go to an apple forum and have some supposed tech-guru claim the new *whatever* is crap in a rather harsh statement and see what happens. The same would go for MS or Sony fans in the same situation. No need to pull the "lol, Nintendo(fans)" card, it only discredits your opinion.
Further more, i think people have every right to search for the right context in which this statement was given. No need to act as developers are never wrong, can't be biased or can't have other factors play their hand. This is not "just" an opinion. The fact that he uses the term "horrible" instead of "too slow" or "outdated", shows he is not being purely factual or technical, but a bit emotional. The statement seems to leave no room for interpretation, and yet is also seems rather subjective in the way it is made. Like saying "you suck". No question about what that means, but does said person really "suck"? I remember a statement about Wii not being able to run the start screen of Resident Evil 5. Were we supposed to take that statement "as is" as well? In both cases they go about it in a dismissive way, not interested in really figuring it out, not worth of another look. One might see that as a sign of arrogance and prejudice. The developers track record is of no concern in that case.
To me, this statement is of no more value than the statements made by Shin'n, a dev team that made Jet Rocket as a Wiiware title, outperforming 95% of actual retail Wii games.