Funny. I was taught that the Neanderthal was adapted to a cold climate i.e. large nasal cavity to warm inhaled air, bulky body etc. Oh well times change!
I think that's still true. As I read the article, a naked Neanderthal would still be more cold-adapted than a naked "modern" sapiens. The modern population had invented better cold adaptations. (Clothing, improved weaponry to secure food supply, etc.)