Whatever the official or unofficial reasons may be that Flash isn’t running on iPhones or iPads, apparently Flash is running all that well on Android phones. Ian Betteridge in Technovia:
Pretty bad. In fact, if you’re thinking video, utterly unusable… Ignoring the broader reasons for Apple wanting to keep Flash off its platform, it’s clear that Flash is simply too processor-intensive to work properly on mobile-class processors as currently specified.
Great video demonstration of Flash on Android.