New K5 low light AF ability?

For anybody who has been wondering how well -3EV AF does, here's an example. This was shot in my friend's back yard a few mins ago, only one neighbor's porch light and the stars offering photons.

Here is what it looked like properly exposed, AF locked surprisingly fast, maybe half a sec or so. Shot was taken from about 50' or so.

This one was overexposed 3 stops to show you what you are looking at. I focused on the white drain pipe for both frames and had no trouble locking either time.

The scene was a bit brighter to my eyes than in the first photo, but nowhere near as bright as the second. It would easily be too dark to make out a face if somebody was standing there. Now I'm sure some will say, what is the point of this kind of AF ability when you can't see what you are shooting anyways? (with human vision that is). Well, knowing that using a flash for portraiture or anything really in the darkness and knowing that you will be in focus is nice. Even landscape that is not shot at infinity will benefit greatly here. I tried manually focusing with both the OVF and LCD, impossible. This kind of AF system opens up many new possibilities. Bravo pentax.

Edit: I should add, both were taken handheld while freezing my butt off at the back door.