The alleged extramarital affair that apparently led to the breakup, however, may be more problematic.
Webb and McCracken have been seen by some as a power couple among Christian artists in Nashville, Tenn., successfully reaching both religious and secular audiences. With three GMA Dove Awards and eight solo albums, Webb entered the music industry as a member of the Christian contemporary band Caedmon's Call, but he later emerged with a successful solo career.
His NoiseTrade music website has also been seen as an innovative space for a mixture of Christian and independent music. With eight albums of her own, McCracken also wrote songs for Caedmon's Call and for her husband.
The reaction has been mostly supportive for the couple, but Webb drew particular scrutiny over one sentence in the announcement.
"While we both acknowledge our own human sinfulness, Derek has taken full responsibility for the events which led to this decision," the statement said.
Those who know the couple say Webb was involved with another woman. According to court documents related to the other woman's pending divorce, the two were involved as early as last August, just as his latest album, "I Was Wrong, I'm Sorry & I Love You," was released. He told the Christian Broadcasting Network he made the album for the broader Christian Church.
Matthew Smith, a Nashville musician who has been friends with the couple, said Webb told him about his affair soon after it began, and insisted the relationship had ended.
"Several of us sat down with him one night in late August and confronted him about the whole situation," Smith said.
In an interview, Webb declined to give any further details. "What I'm interested in sharing publicly, I have shared," he said, "and I'm committed to the protection of my family."
Smith said McCracken filed for a divorce, which has not been finalized. They have two children. McCracken declined to comment further, citing concern for the family's privacy.
"What bothers me is that among conservative Christian circles, people would think that maybe Sandra didn't try hard enough for her marriage or that she is somehow at fault," Smith said. "Sadly, I think sometimes women get treated poorly in situations like this in the public eye."
In his album notes, Webb hinted at marriage in his song "The Vow," and introduced the song as a form of commitment. "I wrote a song basically painting myself into a corner, which is basically what marriage is," Webb said in the introduction, "… but there is real power in making commitments in the face of uncertainty."
Webb has urged his fans to see him as a musician who is Christian rather than a Christian who is a musician — a departure from earlier years of catering to a Christian audience. He is considered to be an edgier artist among some evangelicals, "a truth-teller kind of guy or a prophetic voice among his fans," Smith said.
"But," Smith added, "not all divorce is created equal."
While news of their divorce was shared across social media, the breakup has proven to be less explosive than Grant's. During the 1980s to the early 2000s, Christian music was much more centralized, said Matthew Paul Turner, a Nashville-based author and former editor of CCM magazine.