Switched to AF operation> One shot AF
Switched to AF Method > flexizoneAF 
Switched to Continuous AF > Disable
Switched to Focus Mode > AF+MF or > MF
I AM THE FIRST TO ADMIT that such intricacies of the menu are probably well beyond the target market, but I'll also defy anybody to use the camera with the above settings, using either screen touch on or screen touch off (or indeed via the trash button to centre the AF spot) to tell me the camera has unacceptably slow AF.
Canon got it wrong with the M. They thought that casual users wouldn't care about AF speed, and thought that enthusiasts understood how AF worked. They were wrong on both counts.
The AF speed is fine if you understand how AF works and have reasonable expectations.
I have a 7D, the M won't replace it. If you have a 5D3 or 1DX, the M wont replace it. We knew that.
Maybe I am the wrong person to ask. I'm a video guy. Af is kind of heresy to me anyway. But I've used just about every EOS made (either in previous lives as a happy snapper, student, photographic retailer or as I do now, to earn a crust) and I like the M.
M is for Masochist. It's also the mode I use on any camera.
Green square is moron mode. And the M is lousy in that mode. See above.