I like Thom Hogan's lens reviews, at least his Nikon reviews, but can't agree with him here. I find the Voigtlander 65mm very sharp and I have two versions of this lens, the one that fits the Nikon mirrorless and the Sony version with an adapter, and both are, IMO, tack sharp. And just to make this more confusing, I feel the Nikon 50mm f/2.8 MC is NOT sharp enough and fine enough. I have that lens too but never use it for the reasons I mentioned. Lloyd Chambers finds the Voigtlander 65mm ultra sharp as I do. So, as they say, go figure.
Thom Hogan has not reviewed Voigtlanders, and Chambers has, although Chambers never looked into the Voigtlander 125mm APO-Lanthar, although I pointed it out to him a couple of times.
And so, I have no explanation for Hogan's review of the Voigtlander 65mm.