Its not if to grovel or not to grovel. Neither he nor anyone else that has their hands full have time to debate. So if there is a sincere asking of clarification it may be forthcoming. Usually these things come out as challenges. A challenge will be ignored.
I have had success with Rav Zalman Nechemia Goldberg, Rav Chaim Kaniefsky and Rav Moshe Mordechai Karp of Kiryat Sefer among others.