Oh man I think I've only had Disarm work on me with one guy, oddly enough once I get to a certain level it seems like they shout a lot of stuff where nothing happens. But the Disarm that actually disarmed me... yikes. I can't remember what weapon I had but it was a really nice high-end one of my own making and I was so used to being FusRoDahed and getting flung around... so when he shouted me and that didn't happen I was like "Har, sucks to be you, Draugr" and then I noticed that I was all of a sudden holding nothing but the sad little Dwarven dagger I'd looted out of a chest moments before and I was like... oh
crap.
About that time I also got the dagger shouted out of my hand and that's when I decided that discretion was, in fact, the better part of valor.