I boot from desktop to fully useable desktop in 45 seconds.
Prior to dual booting with Win 8, my Win 7 installation booted from whoa to go in 27 - 28 seconds.... 3rd gen SSD
Now I'm dual booting it takes about 31 - 32 seconds to boot into Win 7.... about 28 - 29 to boot into Win 8
I do have LogonStudio installed, though I never really use it... logon screen's not there long enough to bother with nowadays.
However, I don't know that applying a logon would slow down the boot process by any noticeable degree.