The evidence is that the Linux kernel is one of the most successful large-scale coding projects ever. So whatever Linus is doing, it appears to be working.
Indeed, but that's not to say it wouldn't work even better if he behaved in the way that studies of organisational behaviour general show result in higher performance.
Studies of behavior of certain types of organizations, perhaps. I'm extremely skeptical that such studies are applicable to "organizations" like the Linux kernel developers. If you have any specific studies that you think would be applicable, please give some links.
The evidence is that the Linux kernel is one of the most successful large-scale coding projects ever. So whatever Linus is doing, it appears to be working.