Specific time frames would be of use in such an argument, if you are talking really heavy you are going to hit the HPTA hard as well as have high blood levels anyway, negating the whole thing.
I prefer going a little longer, but I will probably back off of my "6 month cycle" ideas, the biggest issue for me now is eating enough to actually gain any weight.
So what kind of argument are we looking for really. If you are looking for a given amount of weight, can you honestly eat your way there in a short time period, or do you need a longer time frame?