interesting! i'd imagine this would only be present in blowing instruments... but then again, singers can sing without problem even if they stutter (granted, there might be exceptions in daily life, but not with regards to actual performance, i take it)... as you point out, it's T/D for you. probably means that stuttering can, for some, and in part, be able to bleed out into similar activities. i know my movements can tend to halt when my speech does, so it seems likely that other connections could be made too.