It depends on who the opponent is. Obama was for Evangelicals what he was for African-Americans — a rallying point. One group rallied against him, the other group for, but one can’t expect every election is going to produce the same result (at least for evangelicals — sometimes it looks like it does for Blacks). Another race with different candidates might not produce the same result.
A valid statement, but as the article shows, this conservative majority has been the case for a long time and is manifest in many areas: http://www.pewforum.org/Politics-and-Elections/How-the-Faithful-Voted-2012-Preliminary-Exit-Poll-Analysis.aspx