Yup. you've got it right...
I was avoiding a reinstall because I'm a newbie OSX and I was trying REAL hard to find out which soft after the original install made my Mountain Lion a slow kitty to turn off...
But today I said "f*** it... let's reinstall.." And Magic... 4 seconds shut down with all my software installed as if I never reinstalled the OS
;-) Loving this laptop!!