Interesting map

Saw this linked off of Deadspin (the map site itself is pretty cool even if you have a passing interest in geography).

I do have some qualms with it -- wouldn't more of western New England be Yankee territory? And shouldn't the Braves have a wider grip (and even some unconnected parts) because of the omnipresence of TBS on the country's different cable television systems? What about any Nationals presence in the Montreal area?