rumours about load shifting on takeoff are just pure uneducated guessing.
I would not say "pure uneducated guessing". It is from a link reporting that as having being transmitted from the aircraft.
So being purely factual, it is either a mistake / misunderstanding that such a transmission was made
or the transmission did occur and the person transmitting was either correct or not. In neither case does it seem '
pure uneducated guessing' - though whether it is an actual / contributary cause is another matter.