>On the day the reporter was there, it was -10C (8F)
<snip>
>In another article I read about Inuit seal hunters,
>they mentioned that they had bare hands in -30C
>(-22F) weather but didn't feel the cold as long as
>they ate their native diet.

I recently saw a program about tracing DNA from Africa
to North America. They visited some reideer herders in
Siberia who had similar attributes. The narrator was
bundled up in a huge parka and still freezing, while
the herders dressed very lightly and performed tasks
with bare hands in sub-zero temps. They have adapted
over time to the cold by a natural increase in capillary
bloodflow to their extremities.

I don't think it is directly related to diet.