Thanks, Luke; I believe you are right. I was sent this link in which Alcor discusses Smith's hamster experiments:
"These investigators froze golden hamsters to colonic temperatures between -0.5 degrees C and -1 degrees C and quantitated the amount of ice formed in the brain, allowing them to determine how much ice formed in the brains of animals which made full neurological recoveries. They determined that at least 60% of the water in the brain could be converted into ice without damaging the ability of the hamsters to regain normal behavior after thawing. Considerably more ice was consistent with restoration of breathing, a complex neural function. However, the exact quantity of ice (above 60%) consistent with full neurological recovery could not be clearly determined, because of death due to intestinal, pulmonary, and renal bleeding. Nevertheless, tolerance of at least 60% ice by the brain shows that this organ is considerably more tolerant of freezing than is the kidney."
So, below zero, but not totally frozen (~60% of the water froze).
Interestingly enough, I found the same text on CI's website:
(Alcor says -1 degree C, CI says -10 degrees C. Somebody's transcription error, somewhere, from a common original source, no doubt.)