So if you watch someone try to hit a menu, they usually overshoot, then pull back, and basically zero in on the menu they want in some sort of spiral or zig-zagging in on the target. So the Mac's Menu method gives it a much larger virtual target than Windows Menus. Of course the trade off there was consistency. 4 Windows has no menu pinning. 2 BeOS - BeOS pretty much modeled its Menus after Windows.
Muscle memory is maximized, target placement is static, and users are very happy once trained.
Because of that, menu targeting is far better than Windows. 4 Windows menus are never in a predictable place, because they move with the window itself. This sucked, was confusing, and forced users to go to two places to look for things. Thank goodness they learned quickly and adapted. BeOS now behaves like Windows.