That's also been my experience, except for the last time I played the scenario with the Minions (about 5 years ago), when the French 'did a Guiton' and broke through the Allied front line with a single Cuirassier brigade, which then proceeded to win every combat and achieve all its control rolls, routing unit after unit after unit... Including the unfortunate Guards brigades, who happened to be caught in march-column... (Ouch!)
The 13 year-old 'Wellington' was not a happy chappy and hasn't played a wargame since... He joins the RAF next month as an officer, so I hope he has better luck on exercise...
That reminds me; 'Ney' in that game was a girl and she's now doing extremely well as an RAF engineering officer.