Lenovo Tweaking Windows 7 Boot Time Speed
Windows 7 to load up to 56 percent faster than XP/Vista.
Many of us here leave our computers on 24 hours a day, 7 days a week. We do it because we simply need to have some tasks always running (and we have the compulsive need to know whenever a new email comes in). But for those users who are energy efficient and shut off their computers when they're done using them, the issue of boot times is somewhat important.
No one wants to hit the power button on their computer and have to wait minutes before he or she can click on anything.
Lenovo knows that, and boasts that its ThinkPad notebooks and ThinkCentre desktops will boot Windows 7 up to 56 percent faster compared to running Windows XP or Vista, and shuts down in as little as five seconds.
The Idea line of Lenovo computers will also see a performance boost, though not to the same degree as the Think line. Idea PCs will boot up to 33 percent faster and shutdown 50 percent faster than identical configuration, non-optimized PCs even while still initializing things such as anti-virus software.
Lenovo calls its tweaks the "Windows 7 Lenovo Enhanced Experience," which are composed of optimized system files, processes and hardware settings and achieve quicker boot and shutdown compared with non-optimized PCs.
“To achieve Windows 7 Lenovo Enhanced Experience certification, Lenovo’s technical team and developers have worked with Microsoft during the making of Windows 7 to create an exceptionally-engineered hardware and software experience,” said Fran O’Sullivan, senior vice president, Think Product Group, Lenovo. “Advances in PC technology are giving users even better tools to increase their personal productivity at work, and this Enhanced Experience certification lets customers know that our Think PCs are optimized for business.”
Last week, Phoenix Technologies, makers of the popular BIOS, demonstrated a new fast-boot BIOS that goes through the POST phase in around one second. The shorter boot time allowed Windows to load almost immediately, shaving down the time to desktop considerably. The Phoenix BIOS was demonstrated on a ThinkPad T400s, so perhaps that technology is making it into the Windows 7-equipped new PCs from Lenovo.

Ok, I'm done playing grammar police for now.
It's not that simple. What they did was optimize it for those specific sets of hardware. To get the benefits on other systems you would have to completely re-optimize for whatever the hardware config is. It would be very time consuming to do that for all the possible configurations and would take up more space on install discs (and possibly on the hard drive) to store all the tweaks for the hardware combinations.
My old 80GB drive and Pentium D booted Win7 in 1 minute.
My i7 with a nice new 7200rpm Samsung F1 1TB boots in about 1 minute...
Hmm...
Anyways, good for laptops, but for desktop users (as myself), we don't turn our systems off. ^_^
-almost instantaneous restart
-same power consumption than when it's off ! (actually in when "off" my Watt-meter says that it consumes 30W...)