If you look at his source for that, it is purely based on the clock speed and not, (which you might assume from the context), "the speed at which <some given software> runs".
The assertion that we hit the limit in 2004 and CPUs have not gotten any faster (in the useful sense of the word) is ridiculous, and for someone to still be perpetuating the gigahertz myth in 2012 is bewildering. My MacBook Pro has a 2.2Ghz Core 2 duo, and my netbook has an Intel Atom 1.6Ghz, and I can tell you now the MBP single core speed is not merely 40% faster!
The assertion that we hit the limit in 2004 and CPUs have not gotten any faster (in the useful sense of the word) is ridiculous, and for someone to still be perpetuating the gigahertz myth in 2012 is bewildering. My MacBook Pro has a 2.2Ghz Core 2 duo, and my netbook has an Intel Atom 1.6Ghz, and I can tell you now the MBP single core speed is not merely 40% faster!