I'm not sure about the 'research' part of this article. That Twitter exploded when Higgs was announced in Comic Sans? So what? Its a hot button, and a flash-mob flaming on it is not much of a datapoint.
But that's what we've been trying to find with this article: How Typography affects users.
From the different researches cited in the articles (all backed with data), font selection did seem to make a difference. Maybe Little.