TB10ER
As it is a fairly meaningless figure as a demonstrated number not a limiting number I would think that it would be hard to refuse a claim on demonstrated alone.
There are many factors which can lead to loss of control, how steady the wind is ? what the gust factor is, Windshear, pilot ability etc.
Even down to how slow the pilot gets? Rudder authority is relative to airflow as we know in VMC demonstration in twins.
More airflow more authority.
That brings in the consideration in very strong crosswind components of carrying higher speed and flying it on rather than stalling onto the runway. Obviously runway length and headwind component coming into the equation
Pace