I'm using back button focusing, I don't need to half press for full time manual focusing.
Neither do I need to touch the back button, all i need to make sure is the camera is not sleeping.
Can anyone else confirm this behaviour?
If you use the back button then no, you dont need to half press it or the shutter button, you have full time MF without touching either.
At least, thats how it works on my 60D, although i dont use the back button much (i tend to forget its set like that and miss the shot).