Obama's VP text = an extra $118m for US operators?

So reckons Scott M. Fulton of BetaNews.

If Sprint’s early estimates are accurate and if they’re reflective of other carriers’ traffic on the day Sen. Barack Obama announced his running mate, the resulting flow of text message traffic on the nation’s networks could theoretically have generated more than $118 million in extra revenue for the nation’s cell phone carriers.

His maths are sound — on the basis that people are being charged for their texts.? If you’re sat around on an unlimited plan then there’s limited additional revenue for the operators.