“Then Le Vey’s real progenitor is Friedrich Nietzsche”
Short of Darwin, that would be the most often credited inspiration, definitely.
And if I were a judgmental "Randroid," I'd make the claim that the author was using Rand as a scapegoat because he lacked the cojones to go after Nietzsche. That kind of claim is indicative of Rand's kind of moralism.
Incidentally: there's a neat political criticism of Rand that's not often seen, in large part because too many Rand critics take the easy way out by repeating japes that amount to "Don't read her!!!" They make little sense to anyone who had read and understood her work, and thus make Randians more loyal to Rand. We tend to stick with someone longer than we otherwise would if that someone is maligned.
Here's the criticism, which is really one against all forms of individual-centric libertarianism: concentrating upon the individual leaves individuals vulnerable to Big Government of the liberal sort. A nation of individualists fits the liberal-statists' model of a big government overseeing isolated individuals, where governemnt replaces voluntaryist mutual help with the coercive kind. Thus, individualism (in and of itself) offers no bulwark against liberalism.
If you like this argument, you should check out the works of Alexis de Tocqueville and Robert Nisbet.