I am calm. I just think it is very funny that in all these discussions, the documentation gets ignored by so many and speculated upon so much.
It is what it is and the answers are written in black and white.
There is no need to guess or offer opinions. The report flatly states the data is raw and not converted to standard conditions.
It was flown at a 5 minute rating. We can speculate until the cows come home about which of the 5 minute ratings were used.
980mmHg/760mmHg = 1.289 or 1.3 ata or 1% error
990mmHg/735mmHg = 1.346 ata or 1.35ata or 1% error
It does not matter because in the end, nobody knows for sure.
It is a fact, if you convert the French data to standard conditions, it very much agrees with Mtt's published mean performance of 500kph at 0 meters with a -/+ 5% range.