The second one http://exo-science.com/leaf3.png looks like most of what I found. It's strange to see zero discharge at the cut and an particular at the right part of the cut that has an acute angle. Suspicious...

The other like http://exo-science.com/leaf1.png are very similar to the one in the article, but they just have too much detail on the phantom part to be real. If I have to guess, they cut the leave and put both parts on the device.

I'd wait until Mythbuster return.