and with molecular nanotechnology you could go through the whole vitrified brain atom by atom and do the same sort of information-theoretical tricks that people do to recover hard drive information after “erasure” by any means less extreme than a blowtorch...
As far as I know, the idea that there are organizations capable of reading overwritten data off of a hard drive is an urban legend. See http://www.nber.org/sys-admin/overwritten-data-gutmann.html
I would be more inclined to take ErrantX seriously if he said what company he works for, so I could do some investigation. You would think that if they regularly do this sort of thing, they wouldn’t mind a link. The “expensive” prices he quotes actually seem really low. DriveSavers charges more than $1000 to recover data off of a failed hard drive, and they don’t claim to be able to recover overwritten data. Given all of that, I tend to think he is either mistaken (he does say it isn’t really his field), or is lying.