I had Tango installed on mine and it would not do the fast boot thing until I uninstalled it.
Once I uninstalled Tango and rebooted (I think twice) it boots in like 7 or 8 seconds.
This was my solution also.
I have Tango installed, fast boot still ok.
Weird, fast boot wasn't working on mine until I uninstalled Tango and now it works. Don't know if its coincidence or what
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