I e-mailed John Marsh and asked about his level of expertise in the field of DNA research. He replied with a non-answer to my question.
He does seem to have a depth of knowledge on the subject of DNA far greater than my own, though.
Here is his reply pasted:
Hi Jerry,
If you have been following my thread on the Ketchum DNA, I have just discovered that some of my conclusions were wrong, because with respect to mtDNA haplogroup T2b, the Bigfoots and an alleged Cro Magnon were sequenced using the rCRS standard, and other T2bs I was comparing them to were using a more recent RSRS standard reference sequence. Because the Ketchum papers were delayed being released by peer review issues, it did not realize the sequencing was done under the currency of the old standard, and not the standard used by the test company used at the date of publication.
So I have been wrong about some aspects of T2b, and I need to convert sequences to the relevant standards, and review the matter.
It is primarily the T2b Bigfoots I have been wrong about. But I will have to go back and review my conclusions after adjusting the results to the same reference sequences.
Regards,
John Marsh