Maybe I'm way off in left field here.... but I "believe" the hose he's refering to runs from the oil fill to the air filter housing. This would be "upstream" of the throttle body so it would actually be getting "pull" at WOT... correct? Seems to me I saw one at work with an aftermarket restricted filter and the air inlet was full of oil. Engine found that the breather tube was a good alternative for air thus causeing it to pull excessive oil vapor. Also seems to me that they changed this design of later models.