These sort of speeds driving to Le Mans are very foolish. The police know the popular routes, and are going to be staked out (I'm not joking - they hide in bushes wearing camouflage), it's just not worth the risk.
This year I was driving significantly quicker in England than France. Ironically I set off 2 hours behind our group from Calais and despite driving like Miss Daisy, through judicious use of back roads at Le Mans (I was very lucky where I came off, and surprised a few policemen popping out of roads unexpected) arrived 30 seconds behind them.