You make valid points atleast from my perspective....
Its all just a conspiracy!!!!(LoL)
My feeling is that Porsche dropped in a 996 6 speed tranny for the same reason Porsche wont make a factory 986 Turbo....
That would make too much sense and Noone wants to loose out on lost revenue from 996 sales with a 986 better finely tuned and runs circles around their flagship vehicle ;p
...my 2 cents...