I really like it, it's much more cleaner and despite all the comments in here, I find it to be a very smooth transition. I wondered around for a few minutes and pretty much mapped the whole changes.
Looks like nothing I use regularly moved too far away. I like the new top bar (I'm sure this will make it more mobile-friendly). One change I would make is to give the README section a header so it is easier to see where to stop scrolling if you are trying to get to it.
Overall a positive change since the pages are loading faster for me.
I really don't get what's all the fuzz about.