Peikoff's lecture series outlining his DIM hypothesis is available on line at the ARI. It's free - all you need to do is register.
There are 15 sections, each in two parts, and each part seems to be about 45mins to an hour or more long. So anyone who's got a mere 20-30 hours to spare can, apparently, get the vital philosophic context that is necessary to understand Peikoff's recent nutso remarks.
The ARCHN site's team of trained analysts will of course be sparing no effort to parse Dr P's utterances whilst doing the dishes, folding the washing etc for the next 6 months...;-)