I tried it... my hair isn't dry yet so I don't really now if it helped or not.
The thing I already noticed: maybe raw sugar (the thicker kind) would be better, more scrubby.
At least I'm very very sure that it wasn't bad for my hair, since it seems I'm heading to a good hairday after a bad hair WEEK.

So: conclusion:
- Bad result: NO
- good result: maybe
- recommendation: use thicker kind of sugar for more scrubbing results