I think someone figured out how to do the same thing under Linux, and the boot times were extremely quick. However, the boot from suspend technique has a number of disadvantages, like dead batteries. With people booting Linux in under 5 seconds, I think the consensus of the Linux community is to simply make Linux boot quickly.
Did anyone else notice the memory usage? 480 MB RAM for Windows, 174 MB RAM for Ubuntu. Before applications are loaded.
I not to worry about cheap tricks like boot from suspend.