I controlled for multiple exercises per muscle group but it wasn't significant. Plus, most of the studies in the analysis only had one exercise per muscle group. I also did an analysis (which I didn't report because statistically it wasn't as valid) out of curiousity regarding sets per muscle group (rather than sets per exercise), and the results were similar
My research was a meta-analysis and was based on group data, which will include both hard gainers and easy gainers. I have never seen any research to indicate that hard gainers benefit from less volume.
I would agree with your assessment here, and I think it can be generalized to many people in the U.S. The U.S. lifestyle is definitely "hurried", and we're always wolfing down food quickly whenever we can get it, whether it's rushing to work in the morning or grabbing a quick lunch or work break
I lost my access about 6 months after each graduate degree. Now the way I get them is I have a friend who is a med student and he gave me his username/password. But he just graduated so I don't know how much longer that will last.
Yes, the Werbom paper is good, and actually fits right in with the results of my meta analysis. If you did 10 reps per set, 40-60 reps would be 4-6 sets, which is in line with what my meta analysis found.