Test is recommended for EVERY cycle...not just longer ones.. And I do not believe that it takes 5 weeks to kick in... Everyone I know personaly notices gains well within 3 weeks. And eight weeks is simple.. that's the point.. to keep it simple and get a good feel for what cycling is. I've ran a great deal of 8 week cycles in my life, and I've made it very close to 300lbs... So I know first hand that an 8 week cycle is a productive cycle. And 2 months is not an extremely short period of time.
Take care,
Phreezer