I'm confused. Are you saying that they do affect the lens (second excerpt), or that they don't (first excerpt)? I feel I must be misunderstanding you somewhere.Haze is common, and can be surprisingly hard to see. Fungus affects the lens like a combination of haze and scratches
I agree with the general sentiment, though---you rarely know much about the samples of old lenses on which people are basing their opinions, and there are lots of different criteria on which to judge. One person's "soft" is another's "glowing", and whatever you call it, it works in some images and not others.
Stephen Gandy says good things about the Summar too, IIRC.