As a pro-Apple, so-so-Google kind of guy, I have no problems with disabling the QuickTime plugin by default, since it won't affect most users and quite a bit of malware exploits bugs in QuickTime (generally the QuickTime/Java interface). But Flash is worse in every respect, and Google isn't disabling Flash.
If you had to pick between QuickTime and Flash for playing H264 (given that Google has pulled native support for H264) I'd pick QuickTime since it doesn't allow the website designer to festoon the video with ads, links, stupid overlays, and random UI decisions, but better yet would be if Google supported H264 directly and fixed the ugly and buggy <video> tag support.
If you had to pick between QuickTime and Flash for playing H264 (given that Google has pulled native support for H264) I'd pick QuickTime since it doesn't allow the website designer to festoon the video with ads, links, stupid overlays, and random UI decisions, but better yet would be if Google supported H264 directly and fixed the ugly and buggy <video> tag support.