Is that 15 seconds from power on to end of BIOS / start of loading windows? Thats pretty extreme!
Did you trial that with no usb devices plugged in, video priority set in the bios to onboard first?
Just that I am interested in this unit, however I would use cold boot quite often (M4 only allows for 19 hours on standby, so it cold boots at least once a week).
Otherwise, thats one excellent looking board, I have been keen on this ever since it was announced, just need to push the wife for an upgrade I think!