Thank you jniehof and Trail Boss for correcting my statement about alcohol which was a bit inelegant not quite medically accurate. I would not change my opinion of the impact of alcohol in the cold, however, even though those Russians must know something having experience with both extreme cold and alcohol.
With respect to the article cited by Trail Boss, pay particular attention to the last sentence in the summary on page 277. "Alcohol decreases muscle blood flow."
Here are a couple more links which support my concern:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1510798/?page=13 - see page 105 for a summary
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1703192/?page=9 - see page 403 for start of summary with particular attention to the last paragraph
Finally, here is a summary from a password protected article in DocGuide.com. Some of it is technical but it contains additional information for first aid consideration.
"Cold exposure injuries comprise nonfreezing injuries that include chilblain (aka pernio) and trench, or immersion, foot, as well as freezing injuries that affect core body tissues resulting in hypothermia of peripheral tissues, causing frostnip or frostbite. Frostbite, the most serious peripheral injury, results in tissue necrosis from direct cellular damage and indirect damage secondary to vasospasm and arterial thromboses. The risk of frostbite is influenced by host factors, particularly alcohol use and smoking, and environmental factors, including ambient temperature, duration of exposure, altitude, and wind speed. Rewarming for frostbite should not begin until definitive medical care can be provided to avoid repeated freeze-thaw cycles, as these cause additional tissue necrosis. Rewarming should be rapid and for an affected limb should be performed by submersion in warm water at 104 degrees to 107.6 degrees F (40 degrees to 42 degrees C) for 15 to 30 minutes. Débridement of necrotic tissues is generally delayed until there is a clear demarcation from viable tissues, a process that usually takes from 1 to 3 months from the time of initial exposure. Immediate escharotomy and/or fasciotomy is necessary when circulation is compromised. In addition to the acute injury, frostbite is associated with late sequelae that include altered vasomotor function, neuropathies, joint articular cartilage changes, and, in children, growth defects caused by epiphyseal plate damage."