My Olympus E-P3 certainly does not have anything close to amazing low light focusing speed, with any lens. The video linked to simply showed a guy using the touch screen to trip the shutter. I have no idea whether any were in focus, but he claims 95%. I can do the same thing with the touchscreen in decent light and missed focus then is not uncommon. Low light focus by any means is slow and unreliable. Well, unless I am shooting with a bright light in the scene which gives me something to focus on. Then it can become generally adequate.
The Oly focuses very fast (SAF, stationary subjects) in good light with the new lenses, and it may or may not be faster than a good dSLR. I can't tell much difference between it and any of mine, and whatever there is one way or another is insignificant. The noticeable shutter lag (compared to a modern dSLR) tends to negate much of that speed. AF quickly falls flat with a moving subject---continuous AF is not very good at all. I don't even bother with it anymore.
That said, contrast AF is no doubt improving, and sometime in the future might become as good as some of the over-enthusiastic E-P3 reviews have claimed it is now.