Interesting to contrast this to what OS X(certainly Mavericks, maybe others) does. If you restart and opt to re-open previously open windows, they will open wit

Interesting to contrast this to what OS X(certainly Mavericks, maybe others) does. If you restart and opt to re-open previously open windows, they will open with screenshots of their previous states - only when you click on one will it dim the window and admit to you that it's not loaded yet. Personally, I find this a little irritating, giving the illusion that it's ready when it isn't. I find facebooks approach a little better, it doesn't pretend to be usable, but guides your eyes to the right part of the screen.