Take any (published) sociological or biological study with a grain of salt. The samples analyzed have a huge impact on the results. Plus, it is much easier to publish a difference than to say "we find no difference within our experimental uncertainty, which by the way, is not so small".
In those studies, how many men were or had been active in competitive sports or heavy videogame players? And how many women? Any chance sports or videogames improve reflexes? They did with me, now I mostly quit both and I find myself hopelessly slower...