Again, didn't "misread" anything. If that was his intent, then he didn't do a good job at conveying it. All it led mean to believe was that he was implying that Starcofags are the vocal minority. If he was trying to say "the vocal minority OF Starcofags", he should have been clearer.
That being said, the majority of people who post about svtfoe anywhere, not just here, tend to be Starcofags. Any time there's a live chat. Every other comment is Starco related or just says "starco". Tumblr's starco tag by far has the most posts. Tweets to the crew etc.
I can't really say that the majority of Starcofags are silent, because if they were, they wouldn't be true Starcofags. They'd just be fans of the show who like the Star and Marco together but don't care enough to post. In that way, every fandom has those types of people. How they feel doesn't matter, because they aren't making themselves known anyway.
Kinda like the old saying of you don't have a right to complain about the president, if you didn't vote in the first place.