Couple thoughts:
Maybe its just me but I think the docs site a huge step backwards in usability. The dark blue <-> red graphics offset by the blue of their primary buttons is a little...gross. I am also not at all a fan of the left hand navigation panel, I get that they are trying to show off the affix component but I'd rather have the content be full width as its all I am really there for. I found the sliding top sub navbar far less obtrusive and easier to navigate. Also: so white is the default for the navbar but the demo site is still using black?