If Royal comes across as clear headed, intelligent and commanding; she has a very good chance of winning the election as at least 25% of the voters are undecided, should be a huge turnout with the election so close, and her discussion with Bayrou will help her in addition to LePen asking his voters to abstain.
I am not sure I trust any polling coming out of the major polling orgs because you dont know whether their polling is unbiased.
It also ignores media support for Sarkozy. Even if Royal wipes the floor with him you can expect some put-downs and spin from the right wing press.
It's not over yet, but it looks a bit too rabbit and hat for comfort at the moment.