Well, let me throw in my 2 cents, as I've actually tried it:

I vape with a purple days, although I've replaced the power supply with a slightly beefier one so it gives bigger, thicker hits, but which also seem a little hotter and drier. I got curious of the same thing, and on a spur of the moment (i.e. I was high), I just went ahead and did it.

Anyways, IMO it does work in the ~10+ (not sure honestly) times I've tried it, although to what extent I'm not sure. It got me high much quicker, but it wasn't like a whole new world had just opened up or anything.

Be warned though, it dries the inside of your nose out like a mother fucker. Doesn't sound too bad, but nose irritation I got after a hit or two was less than pleasent. Nothing serious, I'm just warning that you might not want to just rip a fat SSV hit up one of your nostrils without trying smaller hits first.

Bottom line: try it. If you have a vaporizer, just put the thing up to your nose and inhale (make sure you clean it really well after), and you decide if it feels any different.