If you don't want to read the fairly graphic article, here's her results:
If there is any smidgen of effect, it's notional, and probably only psychological. Overall, vodka-in-a-tampon seems a very inefficient, not to mention unpleasant, way to get drunk. I suppose the positive is that there is no danger of a second round.
Makes you wonder how many of these other "disturbing teen trends" are totally untrue too.