Let's play the money as dead children game for a bit. Now, when the article was written you could plausibly save 1life for about $1000, but these days I think the number is a bit higher. Let's say $10000 just to be safe.
Essentially, you're saying that you would sacrifice the lives of 100 people in order to avoid a brief homosexual experience, using basic consequentialism. Perhaps you won't change your mind even when thinking about the proposition from this perspective, but I know personally it would be too difficult ethically for me to refuse.
It doesn't have to be lives, of course. If you're more of a preferential consequentialist, you can help pay off your mates' crippling student debt or mortgage, or donate to a longevity charity to help your chances of not dying, or even MIRI or something.
In any case, a million dollars has a lot of potential utility. Refusing because you're not 'materialistic' is a bit short-sighted, I think.
I think he's questioning your claim about "most people", not whether that claim applies to himself, which I think he has already admitted.
A long blog post explains why the author, a feminist, is not comfortable with the rationalist community despite thinking it is "super cool and interesting". It's directed specifically at Yvain, but it's probably general enough to be of some interest here.
http://apophemi.wordpress.com/2014/01/04/why-im-not-on-the-rationalist-masterlist/
I'm not sure if I can summarize this fairly but the main thrust seems to be that we are overly willing to entertain offensive/taboo/hurtful ideas and this drives off many types of people. Here's a quote:
The author perceives a link between LW type open discourse and danger to minority groups. I'm not sure whether that's true or not. Take race. Many LWers are willing to entertain ideas about the existence and possible importance of average group differences in psychological traits. So, maybe LWers are racists. But they're racists who continually obsess over optimizing their philanthropic contributions to African charities. So, maybe not racists in a dangerous way?
An overly rosy view, perhaps, and I don't want to deny the reality of the blogger's experience. Clearly, the person is intelligent and attracted to some aspects of LW discourse while turned off by other aspects.