It's my own estimation based on the evidence I've seen. There's plenty of detail when you look at neural tissue using a microscope: http://www.alcor.org/Library/html/braincryopreservation1.htm...
Re:A Personal Statement from Iain Banks
by polyfractal on Wednesday April 03, 2013 @08:03PM
(#5490112)
That is not peer-reviewed research, and therefore I treat it about as seriously as I treat any other comment on the internet: at best incompetent, at worst maliciously deceiving. Considering its published by a company that makes money from freezing people...probably the latter.
Where do you get that? From what little I understand, 1% seems highly optimistic, given how destructive the freezing process is at the moment.