I clocked this midway through 2012, and I'm not sure why Pirelli didn't
Why didn't they just bring different tyre compounds to the race, rather than going Soft and Super Soft, or Hard and Medium, or Medium and Soft?
Mix it up a bit, that's why it became standard in 2012 after 10 or so races, they finally figured it out this season, but went full retard on the tyres.