I would suspect that it is harder to train reaction time than 'memorization' type skills. If this is the case, and gamers tend to gravitate towards games they a

I would suspect that it is harder to train reaction time than 'memorization' type skills. If this is the case, and gamers tend to gravitate towards games they are good at/getting better at, we would expect there is a lower demand capacity for reaction games than memorization games, because a smaller proportion of the population is capable of 'playing well'.