Additional information:  National sincerity-level study comparing Romney, JFK speeches on religion (mediacurves.com)

GOP presidential candidate Mitt Romney's speech on religion this week was a huge hit with Utahns, especially those who share his Mormon faith.

According to a new Deseret Morning News/KSL-TV poll, 89 percent of Utahns surveyed statewide thought Romney did a good or even excellent job. And nearly as many — 78 percent — thought he has helped his candidacy by speaking out on faith.

The numbers were even higher among respondents who identified themselves as members of The Church of Jesus Christ of Latter-day Saints. Ninety-six percent of them approved of what Romney said, and 85 percent said he helped himself in the race.

About three-quarters of the 320 respondents in the survey conducted Thursday identified themselves as LDS. The overnight poll by Dan Jones & Associates had a margin of error of plus or minus 5.5 percent.

"I'm not really surprised he did that well in Utah," said pollster Dan Jones. After all, his previous polls have found Romney is by far the favorite presidential pick of the state's largely Republican and largely Mormon electorate.

Kirk Jowers, director of the University of Utah's Hinckley Institute of Politics and a Romney supporter, said the speech could have backfired even here because it was taken so personally by so many Utahns.

"I think a less than worthy effort by Romney would have probably been met by more extreme reactions than any other place in the country," Jowers said. "The expectation was so high, and people were taking the subject matter very personally."

Romney delivered his long-awaited address on "Faith in America" Thursday at the George H.W. Bush Library and Museum in College Station, Texas, speaking only in broad terms about his own beliefs and mentioning the word "Mormon" only once.

But Jones said that was apparently enough for Utahns, even though there had been some hope that Romney would use the speech as an opportunity to clear up misperceptions about the LDS Church or even as a "Mormon moment" to attract interest in the faith.