If the French can award level 6 to any holder of a French license, then why on earth can't a level 6 be awarded to any holder of a British license?
This was my point to them too. I actually also hold a UK CAA JAR PPL and FRTOL - but that means nothing to them.
I know from the examiner that several other English pilots were tested by the DGAC and did not receive level 6, and I read on Pprune of an English pilot in Germany also only receiving level 5. So evidently there is something wrong with the testing procedures.