Needless to say, a lot of ad execs were there.
About 71,000 attendees created 109,000 tweets with the #SXSW hashtag, PeekAnalytics found. The company's database allowed it to break down who made those tweets, how much they earned, who they worked for, and where they lived.
One big surprise: Young execs from Silicon Valley tech startups are not over-represented at SXSW. Rather, the predominant demographics are middle-aged male ad execs from Austin itself.
Here's the data.