The all-caps menus look a little strange, but I can see why they did it given that they made the color of the window title bar identical to the window frame. It would be difficult to tell what are menus otherwise. However, in making the title bar blend in with the window frame to give this pseduo-chromeless look, they actually REDUCED the surface area of the window's client area. WTF?
I'm not sure they have, although at first glance it does appear that the menu now takes more space. If you look at the actual space available for code in the 2010/Beta/RC side-by-side comparison image the RC definitely dedicates more vertical space to the code view than the others.