When Rav Moshe tz”l puts it in the Igros, it is considerd paskening for the whole world. It doesn’t really matter what percentage. Finding a teshuva outside the Igros is not always so relevant. There is a mystery here. I am not saying Vdai that the teshuva is not important, I am concluding ?”?.
This is something I posted. I have to say that it is probably wrong, with what I said about Rav Moshe paskening for the whole world. Doesn’t he say in his hakdamah that his Igros are not to be paskened from, rather to enlighten Rabbonim on how to pasken?