Love my LINUX
LOL, same goes, Linux is equally vulnerable. Actually, probably more so, seeing as the kernel is rubbish 
The kernel is only as rubbish as the way its compiled

One reason I stick with Gentoo and don't bother with genkernel, but go through it all myself, never had an issue!
Altho stuff like Ubu, Redhat and Fedora are built so modular (and bloated to cover many many architectures), they add to themselves in regards to problems and performance hits... Although out of those, Ubu does seem to be patched more often than the others.
The vulnerability though isn't down to kernel level, but purely down to the flash plugin itself. Windows will get patched earlier (as-is), Linux will get patched some other time, but this exploit has mainly taken off since it was used to hack Vista.
http://securitywatch.eweek.com/exploits_and_attacks/vista_hacked_with_adobe_flash_vulnerability.htmlEven so, as long as people keep up with various patches and security fixes (regardless of OS), then they should have no issues.
Although I do like the way that it was an Ubu machine which was left standing after 3 days

But then again, Linux never runs its environment or shell as root (unless its a complete cock-jockey of a sysadmin or inexperienced user running it as root and not another user, or they can't configure sudo properly)