About 4 minutes here too. The battery tests are of the bizarre sort - maybe because I use an (original) grip. I found that the warnings about fake batts are only given when the battery compartment has been opened, so you can switch your camera off and on again without having to answer the questions. So far, so good, and I can absolutely work with this.
With two Phottix batteries, however, it only complains about one (specifically the one to the right) and it refuses to doubt the other until you remove the one about which it was complaining in the first place. Same story with the two no-names from China. At first testing, it seem to correctly register battery capacity though, and the battery indicator is no longer blinking until the first shot (which I really hated)(edit: after going to sleep, it does blink. Dammit. /edit). I'll post back if I find different behavior.
The weirdest thing is, prior to the update, I used a borrowed guaranteed original LP-E6 from a 7D wielding friend, and it complained then, too
I'm happy that I bought a 2x TC for my 70-200/4! I now have a 400/8 and it works faster than expected, too! Happy! More exclamation marks! Nope. Couldn't care less about the video