The French are European. I did not notice their practices as being that different from each other. I did not notice the French (in this instance) as being any different from any other European's. There are plenty of other Europeans falling into other hygiene/appearance groups. And to be direct, there are those who are downright foxy.
Ref. something missing in her playing-IMO Piazolla doesn't really lend itself to brass transcriptions. What is active and intense on accordion can be hectic on trumpet.
Furthermore, I think to make musical sense out of it, it calls for more sophisticated insight into the music and I'm not sure maturity isn't a factor.