Sony's Shuhei Yoshida is very tired
If you find it painstakingly difficult to listen to developers talk system tech specs, imagine how hard it is actually being on stage -- having to look interested and engaged in the conversation at hand. Or you could just take Shuhei Yoshida's approach, be a baller, and not care if you doze off in the middle of a panel centered on your upcoming system.
To be fair, Shuhei Yoshida is probably a very busy man. I can't imagine that as the man who runs Sony's Worldwide Studios he gets much sleep, especially with the impending launch of a new console. Plus we all know how soothing David Cage's voice is. So I think he gets a pass this time around.