Author's gender?

Nobel laureate VS Naipaul says there's no female author whom he considers his equal. Read about it in The Guardian: VS Naipaul finds no woman writer his literary match – not even Jane Austen. Since writing and reading is subjective, I've no doubt VS Naipaul is the best writer for VS Naipual! I prefer many others, myself. :)

But this whole brouhaha raised an interesting issue... Can readers discern an author's gender from the words on the page? I say: sometimes yes, sometimes no. :)
Take The Naipual test: Can you tell an author's sex? for yourself and see how you do.