When I said that other people had brought up the subject I made a misassumption that what I was referring to was common knowledge.
It comes from a blowup of the graphic given to the families.
If you have very good eyes or if you blow up the picture; it shows a constant track for each sweep of the search radar for the a/c along the upper green airway.
The MH370 track does not present as being so symmetrical.
This picture was released by the Malaysians.
I think the person who believed it hand flown made a good case. I see other supporting evidence. The known altitude excursion after turnaround also required hand flying.
I see much evidence to support the hand flown premise.