This seems a little irrelevant to your main argument. Cultural evolution is orders of magnitude more powerful than genetic evolution. For example, for Homo Sapiens to naturally evolve an affinity for Pokemon cards would take millions of years, but
through a memetic process (it was 'cool' to have them) we achieved it in months. While it seems that human culture IS leading to more robust gene drift, its more important effect is to make genetic evolution less important....The next generation will never even know what Pokemon is.. etc. The simple idea that being fat is frowned upon by a society, and this leads to lowered consumption, is sufficient.
