He only had him on one segment -- less than half an hour, nothing new was mentioned, and the few callers were useless: two were evangelicals who wanted to go on about how priests should be allowed to marry (you'd've thought you were on FR!) and Colonel Hunt had to chime in on How "Rome
knew" -- none of which were relevant to the actual book, more like they thought he should have written a different book. So -- as I said -- useless.
However, Howie invited him to come back in another month or so. (I hope they have a more efficient screener!)