Best way I can word what's going on is that I was "stuck" in the same type of thought processes and was really closed-minded about muscle building from an more advanced perspective.
I'll use bench press as an example. In the past, I'd prefer to use 315 for 5 sets of 5 reps. Those reps would obviously be fairly fast in tempo. Now I'm opening up to shredding down to 275 lbs and using more control, elongated negatives, different set/rep schemes, and way faster rest periods.
Absolutely nothing that I hadn't already known LOL, but it was something I
completely got away from.
Probably just my ego getting in the way of my personal progress, but it took me seeking IA to kinda break me out of the trance so to speak.
Another example I'll talk about is the use of isolations. I've been hammering away at most beginner and intermediates for so long that isolations are useless (for them), that I kinda forgot that I could benefit by supplementing my training with them. Just basically using the thought process NOW that someone with a 185 lb bench press shouldn't waste their time/energy with some 35 lb DB flyes when they should focus 100% on increasing their bench. BUT, if you're easily benching over 315, then some 50 lb flyes could definately be added in.
Other than that, like I said, his programming is way different than anything I'm used to. And I definately see it working. So it's been fun for me to have something a lot different than I'm used to, which keeps motivation to go the extra mile at an all time HIGH.