They forgot to mention 2002 was the coldest winter in US history.
A good article regarding the US, in particular is:
Horrible effects of global warming: Nice weather, more crops
http://www.freerepublic.com/focus/f-chat/1787700/posts
It has two maps showing how temperatures have moderated in both summer and winter in the US since 1976.
I'm a bit concerned about their baseline data, and that fact that they chose "since 1976" but it is clear that the US has experienced better weather since that time - with generally cooler summers and warmer winters.
Bring on Global Warming!