no. i do not agree. i think the longer you are on, the longer you will be shut down, harder to keep gains in the long term...
The harshness of the cycle, both total dosage and duration will have an effect on how easily you regain your natural testosterone production, that much is true, however, it's not as cut and dry as you might think. A moderately low dosed cycle of Testosterone for a mere 8wks will shut you down harder than you might think. A lot of people are under the assumption that they can run a mild cycle, go through PCT and then their testosterone levels are back to normal, this simply isn't true. From one mild cycle even with a good PCT it will in most cases take nearly an entire year for your LH and Testosterone production to return to normal.
Keeping gains, your body does not want to change and in order for true change to take hold you have to create a new normal. For a new normal to be obtained your body has to become accustomed to a change for an extended period of time, otherwise it will return to its old normal state. This is why so many guys see their cycle gains vanish so easily; they run a short cycle and never allow their bodies to become accustomed to the change.