I think that what " MTOW" is getting at is why is it taking so long for any confirmation, or otherwise, to come from the experts in Toulouse who initially would only say that "it was likely that the flaperon came from the Malaysian 777".
If the French confirm that the flaperon is from MH370, then, presumably, the Malaysians can demand the immediate return of their property. Whilst ownership is not established, the French can take their time to analyse it?