Unfortunately, it doesn't help those who only read into it what they want...
I agree, eschaider, that was an excellent post, and your example about the heavy rotating assembly weight of a fuel motor more than adequately proves the point that there's more to it than a light rotating assembly, figure skaters, and physics books. Kudos.
Your point about the two identical engines, is also spot on. However, it's about impossible to get these guys to realize that there are big blocks that have lighter rotating assemblies, and not every small block will "out-rev" (in their terms) a big block.
Not sure why CobraEd and Al made this such a convoluted post, it's really quite simple to understand the underlying point. I think everyone here has got it except for those two.