Wilburforce - 6:30 pm on Sep 30, 2012 (gmt 0)

it shows how differently you can interpret the same metric

Masses of data and complex formulae do not of themselves increase understanding. What I do not see in MC's statements or current Google results is any evidence of scientific rigour. There is a statistical geographic correlation between Mars Bar sales and road traffic accidents, but an algorithm that targets Mars Bar shops is not addressing the right question. They are shooting from the hip, and - predictably - missing the target and hitting bystanders.