I guess it heavily depends on a market segment, but for "family computer software" it is true: lots of PC users playing with free/evaluation versions but for when it comes to premium subscriptions and premium features - most of them evaporate, whereas Mac users like to stick around.

Look at various PC/Mac softwares out there: most of PC-only software belongs to "free&shitty" category, but nearly everything for OSX you have to pay for, and they (users) are accustomed to it.

I am not sure if I can post results of the research my company has done (and paid for) here.