480 is the flagship card of last generation, and they did not change much this latest gen.
The 480 has 50% more ROPs and memory bandwith, plus almost 50% more shaders, compared to the 560Ti.
You need more than a 20% clock advantage to overcome a 40-50% disadvantage in number of functional units.
...rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law,' because law is often but the tyrant's will, and always so when it violates the right of an individual. -- Thomas Jefferson