Only God can answer definitively as to any specific Mormon. I'm sure many are embraced by Christ. Absent an advance copy the Book of Life, I have no reason to think otherwise.
Mormonism isn't my cup of tea, and I don't see it as fitting my own narrow view of what encompasses Christianity. But that's me. I can't judge the heart of an individual Mormon. Many have good fruits, and a few don't. Other than that, I don't dwell on it to excess.
Lets put this another way. Does Mormonism lead a person to Christ?
The answer is no.
If people believe another gospel, how can a person know Christ? Its dangerous to say just because a person believes in Jesus he is a Christian. The devil also believes Jesus is Lord but that does not make him a Christian.