QT client default ON, darkcoind default OFF.

edit: How much of a problem would it really be for exchanges anyway? Remember that exchanges have a disproportionate relevance in the speculative stage, which we're still in. They become less important as adoption and use increase. I don't see why exchanges shouldn't be anonymising their coins too, same as everyone else. All users would benefit.

And I don't care about centralised pools, they're just parasites.