This is interesting in a medical more than a political sense, but the political background (Bill Clinton's erratic performance during this year's presidential campaign) may put the medical into perspective. On the other hand, while the phenomenon alleged is interesting, I would want more data before I put too much stock in it as the reason for Bill Clinton's performance. All of this is just a long-winded way of saying, "I thought this was interesting."
"The presentation or 'gift' of the Holy Ghost simply confers upon a man the right to receive at any time, when he is worthy of it and desires it, the power and light of truth of the Holy Ghost, although he may often be left to his own spirit and judgment." --Joseph F. Smith (manual, p. 69)
Be pretty if you are,
Be witty if you can,
But be cheerful if it kills you.