there exist various posts/threads here on PPRuNe (use search function) that indicate an apparent reluctance from the side of the French authorities and or french FTOs to operate in the harmonised way
Hmm... Might be worth pointing out that this is a British-centered site. The majority of posts I've seen of the kind you describe are simply based on hearsay or misinformation and are not accurate.
There are only a very few people here who are familiar enough with French aviation to be able to compare reliably. Most of them seem to hang around in the Private Flying forum.
Not to say the DGAC don't have their peculiarities, but that's a discussion which would be only tangentially related to the above.