Counting your carbon calories?

PSFK, which is quickly becoming one of my standby sources for green news and thoughts, had a nice post today on Tesco's (a UK grocery retailer) effort to embark on a labeling system for its products that will chart each product's carbon footprint. Wowsa. Now, the blog post argues that consumers may not really be interested in a product's carbon calories...I rebut that argument with the following: no one thought eating massive amounts of bacon was a good idea until a feller named Atkins came around. Just saying...I think we'd all be much better stewards of the grocery aisles and the world if we turned our attention away from carb counts and made some purchase decisions based on the carbon calorie.

I do, however, agree with the post's challenge to turn attention toward simpler fixes, such as focusing on local products.

So the question is, could you be conditioned to check carbon calories with the same attention as you check fats and such? Would it be enough to cause you to switch brands?