Avira,
who do I believe – you or my lying eyes? I saw a number of mainstream yeshivish and chasidic (non-chabad) Rabonim sitting at the same table with the Rav, teaching with and under him, showing full respect. Why do you feel a need to insult other people’s teachers, I am not sure.
Most magidim shiur that I know are excited when a student asks a question. And so am I when the kids do. You got me with the 30 (well, 90) minutes. It is the first time I got involved into Daf Yomi, as my previous maggid shiur used unprintable jokes about this approach, his question was – what page are we on this month?