Re:#5 Menu Bar is enough reason to not change (Score 4, Informative)

Apple has found that using one menu at the very top increases productivity. "What? You're crazy!" you say. No seriously, the theory is (and it is not Apple's theory, they just adhere to it) is that in order to get to a menu item a user can simply throw their cursor to the top of the screen and 'overshoot' the menu because it is at the very top, in this sense the menu is located at a place of infinite height and is very easy to get to. Now think about a Windows setup where the menu is at the top of any respective window, a user must provide a bit of care/control to get to the menu item because it is possible to overshoot the menu. It doesn't take EXTREME care, it is a minor point, but even with distance and proximity involved (menu at top of screen vs. menu at top of window), you'd have to agree that it is easier to simply 'throw' your mouse to the top of the screena and not worry about overshooting it.