My thoughts on the subject:
Why time off equals time on is faulty logic.
If we lived in a world where each of us were identicle with identicle matabolisms and each of us ran the same cycle time and time agin. We could develop the perfect cycle which would run for X weeks and in which recovery would take the same amount of weeks.
But each of us is a unique individual with different matabolisms, constitutions and different goals therefore we all run different cycles.
If we were to subscribe to the theory that 'time on equals time off," then a six week cycle that consisted of 200mgs anadrol ed and 2 grams of test a week, would require no longer of a recovery peroid than a six week cycle consisting of 500mgs sus per week.
Time off should be determined not by the duration of the previous cycle, but on factors such as precieved htpa recovery, blood tests for liver and kidney function as well as blood lipids. Blood pressure, etc. Goals.
Lets say that you went on a eight week cycle, but eight weeks later your liver enzymes are sky high and your lipid profiles are horrible. It would be attempted suicide to do another cycle at this time.
Another example is a person that ran a 26 week cycle has been off for 6 weeks is motivated and has perfect liver, kidney, and blood lipid profiles. No high blood pressure or other signs of medical problems. That person is prime to run another cycle if he or she so desires.
So please people, before you blindly advise someone "time off equals time on" consider the varibles.