I would say yes. From experiences with Adobe AIR and Java apps on Mac OS, Jobs knows that cross-platform toolkits are lowest denominator apps that don't work th

I would say yes. From experiences with Adobe AIR and Java apps on Mac OS, Jobs knows that cross-platform toolkits are lowest denominator apps that don't work the way people expect them to. They're sometimes tolerable out of necessity, but they're never best-in-class, and they're often completely intolerable, unreliable, slow, and buggy. As an example, I refuse to use Tweetdeck on the Mac, because even though it does exactly what I want from a Twitter client, it doesn't behave at all like a Mac app should. It uses too much memory, it's slow, it's crashy, and the keyboard shortcuts for moving around text fields, that I use in every other app, don't work. Instead I use Tweetie, which does almost none of what I want (except showing and making tweets), but behaves the way an app should, so it's less jarring to use.