According to Wiki it is, a sudden change of position on an issue, also called a U-turn. I have never seen it defined any other way.
I disliked Hitchen's views on God, or the lack thereof, and thought his arguments shallow. I watched him debate Tony Blair, and he won by simply charming the audience........and due to fact Blair refused to push his points. Debate is a fight, with rapiers......when you are making a point, push it through.
Of course, Blair was hindered by the fact he is a Catholic. (for you Gerry)
I enjoyed immensely the fact that Hitchen's disagreed with the politically correct view of almost everything, and from what I have read of him personally, I probably would have liked him immensely.
He will be missed, by anyone that admires intellect for its own sake.
Ramming the point home:
The PJ Tatler » Christopher Hitchens at His Best: Rare Video of Hitch Disemboweling the American Left (external - login to view)
In this case it wasnt really sudden. In his memoir, Hitch-22 he lays out how his opinion changed on Iraq and it took years for it to happen.