Neat article. It almost made me want to buy a Peterson System Pipe (eeek!). Two things still prevent me, though:
1) "the unique graduated bore of the mouthpiece made the suction 15 times weaker when it reached the tobacco chamber...".
Well, wouldn't the taper actually make the smoke to travel faster in the thinner section, thus leading to tongue burn? (Unless this doesn't happen because the smoke has been cooled by the chamber at this point... hmm.)
2) The hole opening upwards.
2.a) The P-lip might be OK for clenchers, but I'm not one. When I draw the button is never beyond my teeth, but between my lips. Yeah, I draw as from a straw, and I must ALWAYS hold the pipe with my hand to prevent it from falling off my mouth, since my lips are too weak to hold it. I just can't draw with the button past my teeth, unless I'm doing the breath method and I stopped that because it was irritating my throat.
2.b) If the smoke still comes hot enough, by directing it upwards instead of towards the tongue, you'll hit the palate, whose epithelium isn't as strong as the tongue, with a blast of heat. I think I'd end up with a worse burn elsewhere.