I have no decent estimate (and let me say that all of my projections ignore the probabilities of total societal collapse from various existential risks. That isn't to say I don't believe there are any such risks, just that I find them non-useful in projecting the timeline for various advances).
Defining swans as white only works until you visit Australia.
In a comment on his skeptical post about Ray Kurzweil, he writes,
I wonder how people on Less Wrong would respond to that poll?
Edit: (Tried to) fix formatting and typo in title.