I tend to disagree with that opinion.
It is the democrats who will bring out every facet of his Mormon faith and they will use it like a club to beat him with.
Romney has said he will not discuss his faith as far as specific doctrine. Fair enough but the MSM will not let him get away with that.
Here is a link to what will happen should Romney get the nomination. Written by a conservative. And she is completely right.
http://betsyspage.blogspot.com/2005/06/robert-novak-reports-on-visit-that.html