Me too. I was also fed the same concept that I will outgrow it. Though I somehow did mitigate it to some extent, but the blockages still stay. I don't remember much about how bad my stuttering was when I was pretty young, but it is still pretty much persistent in my mid-20s now. Parents try to convince me that it has reduced a lot and I have outgrown it. I just let it be and not argue over it, but I know it hasn't. And I am apprehensive that this will stay as a dead-weight over my neck forever.