Between the ages of high school and now I was a covert stutterer (or at least I thought I was one). Since I'm now as open about it as I can be, I guess apart of me feels guilty not so much for being fluent, but for "tricking" (in a sense) people into thinking something I'm not (which I've already done for a good portion of my life). I agree that we are more than our what we say and how we say it.