I think those numbers didn’t hold. There is a thread here today about the change.
Unless I bungled the point, Romney is able to better score over Obama because the supporters of the non-Romneys remain unable to coalesce around ONE non-Romney candidate.
Frankly, the modern primary seems to have been successfully co-opted into a divide and conquer process for us, and a straight line advantage for the RINO Establishment. They unite to project their candidate, whom they have drowned in cash, influence and well timed endorsements. We bicker between three or four other candidates, while their guy runs the creases. What a strategy.