I, like many others, typed the 01 AUG 1972 memo out in MS Word on 9 SEP when I first read about the discovery as posted here. It matched perfectly.
It was a pleasure to read the expert analysis provided by the author of the article that was the lead into this thread. It tied up the last loose end about kerning.
On the other hand, it has been extremely aggravating to read the incessant squabbling of pseudo-experts with 30-minutes experience in some posts on this forum. In particular, there were those that posted screen captured images of extremely distorted text from the memo who held forth that they showed definite evidence of kerning. It was clear to me that those images did not prove kerning.
The author's explanation about trutype fonts ends the controversy about kerning. Lectures from someone who signed up at FreeRepublic just today don't really help me out.
I was told early on to look at the "CYA" for evidence of kerning. I looked and didn't see it. I said nothing because I could see some places that looked like kerning.
This essay explains the difference between TrueType and kerning and simple proportional spacing.