Doesn't really explain why it's available, yet post dated. Online and physical publishing are different beasts
Here's the link to the article on the Automobile Mag site:
It says at the top of the article: "From our January, 2012 issue".
It seems in the new world of publishing you get content out as soon as possible online, even if it means pre-empting the print copy that will arrive 30 days later. (I received my December 2011 issue yesterday).