First off--
My response to the whole article:

I agree with Marius. I think we actually had a discussion about this before. Just more Kung Fu Magazine trash. It's impractical, and why do that when at that range, you're already close enough to use a
weapon? Makes no sense at all. Plus, it doesn't really solve the whole range difference that they hyped up in the sensationalistic beginning--how do you unhorse a horse archer with a flying kick if he's that far away? (Mongols invented stay-away-and-shoot? I had to laugh).
Hailong, put it this way. They made the claim. Burden of proof is on them. They don't meet it.
Just be careful about what Kung Fu Magazine says. A lot of the stuff is just martial arts lore (a lot of downright untruths, all meant to help generate popularity), and this is one of the examples. I'd like to see this backed up with credible historical evidence.