It really comes down to the individual doing the brazing or preparing the frames for robotic brazing.
Most notably, Peugeot proudly advertised on their frames with decals saying "hand brazed" in the 80's, the problem was, a lot of their frames had very sloppy brazing and lug preparation. It took me two trips to the Peugeot dealership to find a PSV bike that had good frame quality. Many had lugs that seemed to have been slighly misaligned to the tubes, gaps between the lugs and tubes, lugs that had points that looked chipped (ground off too much?) off at the tip, blobby brazing coming out of the lugs. I think a lot of french frame builders use their experience at the Peugeot factory as a start to their careers in the business and move on, so there was always a good supply of newby braziers at the Peugeot factories, from hwat I saw with the bikes at the dealerships.
Just glad to have found my PSV with a good frame. Must have been a senior brazier that stayed on at Peugeot.....til the robot welders/braziers came in???

Chombi