I don't know how Slashdot did it, but "insightful / informative / interesting / funny" seem to be exactly the four qualities that can make a piece of text good. If you either added a bucket or took a bucket away, the signal to noise ratio would go down. At least from my perspective. But maybe women have different buckets, or have a different optimal blend of how much should fall into each bucket.

edit: My proposed mechanism for this is that the pattern matching in women's brains is less strict than the pattern matching in men's brains (i.e. women see patterns more easily), which for women blurs the line between interesting and insightful. But I don't actually have any credible evidence to support this, so take it for what it's worth.