In order to poll Twitter, each device registers itself on our server. Passes in the oauth token etc. So I can keep a consistent watch on things server side, but actually verify the legitimate sales (vs. pirated copies) the next day, once the daily reports are available.
As far as what it did for sales with just that short little blurb? Awesome. That's what it did. :)
I can post actual growth percentages tomorrow once I have confirmed the data from Apple vs. my own analytics. It certainly made my day!