At a guess, it would largely solve the UMP's problem with triangular second rounds vs. the PS and FN, which will cost them dearly this time. If a majority of FN voters give their second preference to the UMP, this would probably tip the balance to elect the UMP candidate in the first round, in most cases.

Insofar as it gives more power to electors at the expense of the parties, it's a good thing I guess... though it hurts to say so.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}

Actually, not necessarily. It depends on how it would be organised. So I should take that back.

Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi

The two round general election system is oriented to accomplishing a similar end as the second preference system, but generating more work for journalists. But given the 12.5% of registered voters ~ 15.6% of the electorate with 80% turnout, 19.2% of the electorate with 65% turnout ~ a second preference makes it easier for minor parties to get over the line for the second round.

I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.

Likewise, the system would probably encourage the natural tendency of the mainstream right to run two candidates, since they wouldn't have to worry so much about being eliminated by the FN.

So it's all positive for the presidentials.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}