And yet none of what he talks about does anything to help that. I'm not against oversimplifying, but what he's saying is entirely bogus, shadows being expensive

And yet none of what he talks about does anything to help that. I'm not against oversimplifying, but what he's saying is entirely bogus, shadows being expensive has nothing to do with how many threads the CPU can issue commands with. He's setting up this notion that the problem with graphics is a lack of threading, which is ridiculous. Graphics code is incredibly parallel, and his assertion that graphics work spends most of it's time constrained by waiting for the CPU just does not add up to me. Except in poorly written systems, I just haven't seen this be the case often at all.