Ever wonderd the fastest ever OS !!!

ubuntu (linux)  2 sec (boot)   less than 1 sec(shutdown)
 windows 7 (windows) 5 sec (boot) more than 10 sec(ShutDown) 
windows xp(windows)  more than 10 sec (boot   :P :D xD ) more than 10 sec ( shutdown :P :D xD) windows vista(windows)  more than 5 sec(boot) more than 10 sec(shutdown)

the fastest os - ubuntu
the best os - windows 7
most used os all time - windows xp
os with most bugs - windows vista