The Kiel lab used a model of ocean currents to guess its drift path.
French investigators strongly assume it comes from the lost jet.
I suspect that neither of the above statements is correct.
1.. There are many places in the Indian Ocean where the flaperon "could" have originated from and arrived at La Reunion.
2.. No. The French investigators are questioning what they have so far found, i.e. the expected Serial No. plate is missing, and repairs/mods supposedly by made by MAS don't match what they see.
Finally, what particular point are Geomar trying to make? Can they gain support from the INMARSAT data for their claim, or are they just trying to debunk any other theory?