SJS, thanks for the kind words.
Zalman, When I spoke to Reb Dovid Feinstein Shlit”a , he said it was his father’s pshat. He says he’s not arguing on his father. It’s bavust among the Lower East Siders that Reb Dovid Feinstein ate chalav stam. This wrinkle that the rebbetzin did was new to me, but I heard this story from the source’s husband. IE, it’s not a rumor in the velt, but an accurately traced source. For you it’s hearsay because you have no clue who I am. But I know the source, and for me it’s reliable. This was a person who wanted to keep cholov yisroel when he got married but he couldn’t because his wife kept mentioning this fact, and are they going to be frummer than Rav Moshe Feinstein ZT”L? As always, ask your local rav- I’m certainly not a rav. But those interested in being mevakesh the emes can find out the truth for themselves.