Well you guy's are most likely right however there is a potentional 6dB gain in amplitude when feeding the two LFE inputs on the Sub with a Splitter and I suspect my friend thinks that by splitting out of the single LFE on the receiver he's created a parallel circuit and thus affected overall resitance and thus signal strength and is viewing the two splitters at the Subs as a way to compensate. There is no doubt that thinking about this gets the Ol' Eyebrows Twitching but it does make for interesting discussion.

Yes, my sub for example has two LFE Low Pass inputs, you'd use the "Left" for a single LFE however the two may be there for runing inbetween a Pre-Pro but I'm not sure. There have been recommendations to use a splitter at these two Inputs for Subs that have an Auto-On circuit that's not sensitive to operate with the single LFE input. Using a splitter sends the same Signal to the two inputs and has the same affect of a 6dB channel level gain in signal.

at least this is my story... and I'm sticking to it