Instead, all indications are that the abort was only initiated many seconds after VR, which seems to point to the possibility that the yoke came back normally, and the problem was not recognized until the nose failed to rise as would be expected in a typical rotation, consuming many precious seconds, and many hundreds of feet of remaining runway.
My thinking is trending to go in that direction. Based on an incident that happened to me back in 1981 when the aircraft I was flying failed to rotate at V-R. There is a WTF pause at that moment, that costs some time, precious time I might add.
In my case I was able to finally rotate with full up elevator while applying up trim. There was not enough runway left to consider an abort. The cause was a forward CG issue that I was not made aware of.