Paul Delia was recommending 2-3 minute rest periods in Max-OT twenty years ago before Paul Carter graced us with his divine knowledge and influence
He's such a turd and he rips off everyone. He even has his own variation of DC that he charges people for. Needs to shave his chin strap and shut up.
In the '80s and '90s short rest periods were considered better for hypertrophy. People make gains no matter how they do it.
Personally, I'm 60 seconds between warm-up sets, 2 minutes between work sets. Sometimes 3. It never puts anyone out though because I only do two work sets per exercise right now and once I've done warm up sets and work sets on the first movement, I go straight into work sets for the second. So for example, I only used the leg press for about 5 minutes yesterday as it was my second exercise. Meanwhile the teenager next to me seemed to use the other one for over 20 minutes as he rested forever between endless low-intensity sets.
On higher volume, I would shorten all rest periods to 60 seconds, otherwise the workout would take forever.