Believe it or not, one of those taking this view is the arch-High Tory, Peregrine Worsthorne, sometime editor of the very right-wing Sunday Telegraph:
This is encouraging because it gives us hope that there might be significant numbers of similarly-minded Tories who, though unlikely to vote for Ken, will not bother to turn out to vote for Boris.
If Boris loses, that will be bad news for David Cameron. But if he wins it will be much worse news, because the Boris campaign has shown that without the jokes there is nothing there. He just can't do seriousness and responsibility. So with two years to go before the next election, Boris will have had more than enough time to demonstrate his lack of bottom; a demonstration which will call into question the whole Cameron -- a horse from the same lightweight stable -- enterprise.