Earlier this year, San Francisco's City Church caved on homosexuality. That's notable because it began as a PCA church plant. In general, that's a very conservative denomination.
More recently, another church on the left coast caved:
That's notable because Intown Pres Church is a PCA denomination.
In addition, these may not be isolated cases:
i) I seriously doubt it's coincidental that both churches are located deep in blue state country (Portland, San Francisco). They are cratering under the prevailing social mores of their surroundings.
ii) A few years ago, the pastor (Brian Prentiss) of Intown church defended the pastor (Fred Harrell) of City Church:
Recently, Prentiss also made a very insulting comment about Christians who affirm that the human race goes back to Adam and Eve:
iii) I wonder if there may not be a connection to the "Escondido theology," viz. Hart's A Secular Faith. Let's surrender the culture wars to the enemy.
Finally, the fact that Bible-belt churches are less likely to fold in the culture wars doesn't necessarily mean they are anymore committed to orthodoxy and orthopraxy than City Church (SF) or Intown Church (Portland). It's just that, as of yet, they aren't subject to the same seductive or oppressive environment. So we shouldn't take false comfort in that. To some extent that's cultural Christianity. There may be extensive dryrot in many outwardly sound churches. It only takes a polical windstorm for them to collapse. We need sound theology, apologetics, and piety to stay strong. Otherwise, churches lack structural integrity.