Is Egalitarianism/Complementarianism a Gospel Issue?

Scot McKnight links to an article by Dan Stringer, asking the neo-calvinists whether complementarianism is essential to the gospel. Can egalitarians be gospel-centered?

(Complementarianism and egalitarianism relate to the roles of men and women in the church, home, and society. Egalitarians say that there should be no distinctions between men and women. Complementarians say that while men and women are equal, God has assigned them diferent roles. Most complementarian churches would reserve the role of elder or pastor to a man; some would go farther than that.)

At issue is the neo-calvinists' strong stance on complementarianism. Stringer asks whether the neo-calvinists have allowed a secondary issue to muddle the gospel.

The discussion was on interest to me because I think some, like my hero James Dunn, may have gone to the opposite extreme and made egalitarianism a part of the gospel.