Overall, the author's argument is somewhat dependent on a premise that Windows 7 should be optimized for edge cases such as compiling code written for multiplatform implementation (e.g. Chrome) rather than using the managed code model around which Microsoft's development of Windows has been centered for many years.
If one were optimizing Windows performance, none of the specific areas used as examples would receive much attention given user demographics. What percentage of Windows users use the command line, much less compile C programs, never mind using "cmd" shells to do so?
Windows command line gurus will be using Powershell these days, not the legacy encumbered "cmd" - elsewise they are not gurus.