(2) is the interesting claim, though I'd hardly trust his word on (1) since I didn't see any especially alarming paragraphs in the actual paper referenced. I'm not an expert on that level of neurobiology (Anders Sandberg is, and he's signed up for cryonics), but I am not interested in hearing from anyone who has not demonstrated that they understand that we are talking about doing intelligent cryptography to a vitrified brain and potentially molecule-by-molecule analysis and reasoning, rather than, "Much cold. Very damage. Boo."

Unless someone spells out exactly what is supposed to destroy all cues of a piece of info, by explaining why two cognitively distinct start states end up looking like molecularly identical endstates up to thermal noise, so that we can directly evaluate the technical evidence for ourselves, all they're asking us to do is trust their authoritative summary of their intuitions; and you'd be just plain dumb to trust the authoritative summary of someone who didn't understand the original argument.

I'm trying not to be impatient here, but when I actually went to look at the cited paper and it said nothing at all about damage, it turned out this eminent authority's original argument consisted merely of, "To read off great synaptic info with current big clumsy microscopes and primitive imaging processing, we need big pressures. Look at this paper involving excellent info and big pressures. Cryonicists don't have big pressures. Therefore you're dead QED."