Sly- the only thing we know about DAA is that 3.2grams of it daily, in the morning, raises testosterone 42%. We don't know more than that. Everything else anyone says is abitrary- just like "feeling a test booster after 4 weeks"...that is arbitrary, it would be different depending on each individual and each different test booster. You cannot lump them all into 4 weeks till you feel it so add 4 to that.
Heck when you pin real AAS, or take PHs, you might not "feel"/"see" results immediately, but you get anabolic benefits immediately with the first dose.
Not trying to knock anyone or what they are doing, but I think running anything 8 weeks straight you should put a lot of thought into whether its a good idea/even effective in the first place.