No one provided a good response to The Big One. If the basis of the heter is purportedly Reb Moshe, and the Igros Moshe makes clear it applies only Bshas Hadchak (plus even then a Baal Nefesh will not utilize the heter)…
Jothar, 1) Its more likely (to say the least) you misinterpreted Reb Dovid, then that Reb Dovid misinterpreted Reb Moshe. [BTW did you learn in MTJ? The last time I spoke to Reb Dovid — which was a number of years ago — the best way to reach him was on the Yeshiva payphone. Is this still the case?] and 2) you completely misconstrued what The Big One said; your paraphrasing him was punkt farkert from his point that there is no such halachic status as Posek Hador, (i.e. there would be no reason, let’s say, to follow Rav Moshe’s shiurim for the Pesach seder than those of the Chazon Ish) and that at least in America, the only other two personalities who were considered Gedolei Hador of that caliber of Reb Moshe were Rav Aharon Kotler and the Satmar Rebbe. NOT that Reb Moshe psak is always universally accepted. (i.e. do you enjoy a refreshing air conditioner on Shabbos that was turned on by a Shabbos clock – keneged the psak of Reb Moshe?) The problem The Big One pointed out, is that many of these people will accept Reb Moshe’s psak ONLY for his kulos (i.e. Mechitzas and Cholov Akum) while rejecting Reb Moshe’s psak when he is stringent.
Rob, I believe Reb Moshe’s psak vis-a-vis Cholov Stam (even with the fact Reb Moshe said it only applies Bshas Hadchak) is much more expansive than either the Pri Chodosh or the Chazon Ish.