This is behavior that could be expected when you evaluate _any_ infinite Taylor series far enough away from where the series is centered. Denominators of a typical Taylor series are fixed and the numerators depend polynomially on x.
The post is definitely an interesting observation. I would chalk the miracle up to Taylor series and analytic functions in general, however.
The post is definitely an interesting observation. I would chalk the miracle up to Taylor series and analytic functions in general, however.