What do you mean by "utilitarianism"? The word has two different common meanings around here: any type of consequentialism, and the specific type of consequentialism that uses "total happiness" as a utility function. This sentence appears to be designed to confuse the two meanings.

Yeah, my mistake. I'd never run across any other versions of consequentialism apart from utilitarianism (except for Clippy, of course). I suppose caring only for yourself might count? But do you seriously think that the majority of those consequentialists aren't utilitarian?