Re: +1 for X220 mention
"I have a very similar X220, except with Xubuntu, and I swear that it boots in well under 45 seconds"
Probably does. Slackware does an old school boot and for some reason the 'kernel test' takes 10 seconds. But I mostly suspend and reboot once a week or so or when kernel updates arrive.
Coat: mine's the one with the Slackware DVD in the pocket