ccording to the BEA there are 6 Airbus technical advisors on site. They will have seen the evidence close up, not the photos that PPruners are trying to interpret. These Airbus experts are just as likely to be British, Spanish (or German) as French. In the course of their work they are representing the manufacturer, not any particular nation State.
Just a quibble, but the Airbus technical advisors do represent the state of manufacture and as such their findings are expected to flow through the Investigator In Charge.
It is likely that any outside influences in what the press prints come only from within states (Prime ministers, presidents etc.) and not from technical advisors on-site.
I was particulary impressed by the guy in the videos writing with a sharpie pen along the fracture of the tail empenage. The arrows he was drawing map the progression and direction of the attachments as they separated. This likely will be used to assess the aerodynamic force vectors responsible. Do this over other major sections of the aircraft structure and you can point to the location of the initial break and then concentrate on a laboratory examination for things like over-pressure and/or cratering