My take on this topic, and I’ve talked about this in many seminars, is that studies use mostly beginners.
And even the subjects who are not beginners in the sense that they have been training for some time, I still qualify them as beginners because it’s mostly recreational lifters who never trained hard enough to stimulate gains.
People like you and I; those who are hardcore lifters, don’t want to put their own program on hold to train on what is typically a very basic, beginner program for 6-10 weeks.
Why is that important? Because what we call central fatigue; the main reason why longer rest periods are touted as being superior by reducing the strength of the neural drive (thus reducing fast twitch fibers recruitment) is caused by afferent signals of pain, discomfort and unusual effort/perceived effort.
Basically, if something feels hazardous for your health, your body will inhibit its capacity to do it by reducing the neural drive to the muscles.
In beginners, this protective mechanism is a lot more conservative and kicks in more easily. But as you gain more experience of hard training, your body knows that the sensations felt during a hard set is not going to do you harm so the protective mechanism known as central fatigue becomes harder to trigger.
It’s kinda like working in a very loud factory: the first few weeks the noise really bothers you and fatigues you like crazy. But after a few months, you become accustomed to it and it stops making you tired. The stimuli is still there, but the brain doesn’t react the same way.
For example, I once trained a pro football player (offensive lineman) and in the last phase of training we were working on the capacity to maintain a high. level of force with only 40 seconds of rest (the time between plays).
So we did 5 sets of 5 with 45-60 seconds of rest.
The first week looked like this on the bench:
420 x 5
60 sec of rest
420 x 2
60 sec of rest
365 x 5
60 sec of rest
315 x 5
60 sec of rest
275 x 5
By week number 4 he was doing 420lbs for the five sets of five with only 45 sec of rest!
I’ve also trained Crossfit athletes who would get their PR on a lift during an EMOM (so less than 1 min of rest between sets, adding weight every set) and even on a ladder (adding weigh every set, but with like 10-20 sec of rest).
Heck, I’ve even had a female Crossfit athlete hit her PR on the snatch (185lbs) right after a 400m sprint!!!