Another assumption is that if you'Ve bought an Ivy CPU you must be mad moving from Sandy, when a lot of people like myself never bought Sandy and are upgrading from much older chips!
The 3770k vs 2600k is interesting because of the price gap, the 2500k and 3570k are so closely priced on most decent sites that for most the Ivy is the logical choice.
Indeed - I went from an Athlon X2 4200+ (from 2006?) to a i7-3770K. It's fair to say I've noticed a slight increase in speed

