The wobbly swords can still cut.
If you thrust them right, they snap really lound too. They STILL hurt, and, although not as sharp as a real sword, and experienced guy using them on an unexperienced guy would definitely be able to chop their head off.
I have several friends who do wushu here in the US, and they go over to china each year. To practice with these guys....
They try to get me to start wushu, but....I'm not one of those crazy good martial arts type of asians.
You DON"T wanna fight anyone like that.
They are fast, as you can see from the video.
You won't be able to punch them while they are spinning either, since they'll show off when you are a reasonable distance away :3
Your best bet is a gun XD
Heck, even when I'm 30 and ripped, the youngest kid in that vid would still be able to kick my ass.
Cool vid though