To me, Susan Boyle is a metaphor to how we ex JW's sometimes perceive others as looking at us, because of our past. Or even worse, how we sometimes view ourselves. Sometimes, we judge ourselves only on the ugliness of our JW past, and not how we really are.
To the extent some ex-JW's have inferiority complexes, the problems mostly stem from their family and/or mental issues, not their religion, imo. We can know this because very many exJW's don't view themselves this way, and because so many people of other religions do have inferiority issues.
I'm not saying that some ex-JW's don't believe that "the world" views them as flawed because of their JW past, but the witness religion certainly didn't put that in their head.
And as for that little minx Susan Boyle, I don't know what the take away from that sort of stuff should be. I certainly feel "it" (inspiration? inspired to what?) when I see a Susan Boyle or a Paul Potts knock it out of the park, but the truth is they are only in my scope of awareness because of a tv show and the fact that they have something most people don't have. To that extent, they are exactly like a beautiful, sexy, actress.
I think I know why Paul Potts and Susan Boyle inspired tears when I first saw their performance: I was feeling empathy for their success, knowing it was that much sweeter and karmic because they are such unlikely looking people.