Some of the points he makes are not really accurate.

For example, he states:

"as machines get 4 cores (processors) and then 8 and then 16, apps written for Snow Leopard and beyond will continue to be faster and faster, with no changes, while Windows programmers are going to be struggling to make their apps work at all"

This statement isn't true.

Windows, more specifically the .NET framework (and the associated compilers), has had support for thread pools, and cross-thread dispatch since 2003, and support for closures since 2008. Those features are, effectively, equivalent to grand central dispatch on the mac.

The Apple non-developer docs do indicate that there may be some scheduling improvements that might make GCD more efficient, but without any actual benchmarks between the two technologies, that claim doesn't have any basis in fact.

I'm not trying to be a shill here, but its important to point out that not everything he claims is true.