indoorsman

This is a big update, i had to crack open the new manual as there is a lot packed into the menus now.
 
Just wanted to pass along a few observations while shooting with the 27mm (this was from last night, so imagine: indoors, incandescent lights, etc)
 
The addition of zone focus is largely what makes this a brand new camera, as others have noted. It takes the multi (area) focus setting in previous firmware, but the camera restricts itself to the pdaf points on the sensor. It now (finally!) focuses generally like it always claimed (.05s) - i would say that on average, it actually is faster than single point focus for the following reason: the camera reacts like it uses multiple pdaf points at same time to aid focus (this shows on the screen as several focus point boxes, and those boxes are really not a gimmick). So a particularly tricky auto-focussing scenario with low contrast or a single line becomes much easier for the camera because it can pull in much more information to arrive at a focusing solution. 
 
Continuous and zone focus work well in these (not great) lighting conditions also. This is a big deal - continuous focus is not largely a fake switch on this camera anymore.
 
Going to wide area focus with continuous focus caused the 27mm lens to rack focus back and forth, so it appears that in wide focus the camera does not attempt to give preference to the pdaf points. So, I would recommend generally sticking with the zone focus setting.