Isn't your first point also true of mouse movements under certain circumstances? I am specifically thinking of the Apple style of fixing the menu at the top of the screen given the display resolutions at the time, and of "pie menus" on today's hardware:
A friend works on high-end image editing software (Maya). Their research is that pie menus are faster than keyboard commands and both Apple and Windows style menus because the user is learning write flicking gestures and their hand is already on the mouse for drawing activities.
http://en.wikipedia.org/wiki/Pie_menu
A friend works on high-end image editing software (Maya). Their research is that pie menus are faster than keyboard commands and both Apple and Windows style menus because the user is learning write flicking gestures and their hand is already on the mouse for drawing activities.