I think most lie about it.
There aren't many women who NEED a huge cock to be satisfied. Size queens are rare. So are women who prefer a small cock. There are a lot who prefer about average or have no preference at all. The thing is, it seems like 80% of women will tell you it doesn't matter at all, but then behind closed doors with their girlfriends or a really well hung guy, more than half of them admit they love huge cock. At least, that's what I've found with dozens of women.