I think they
can be just as readily, not that I mean to tell you your own interests of course but if one is interested in accents/linguistics/usage etc. then the patterns are perhaps more noticeable.
I'm British, so I'm not that familiar with many American accents, certainly not your examples, but off the top of my head you do find elongated vowels, t->d, ay->i (short), rhotic r, nasalisation, 'vocal fry', 'baby voice', and ending every sentence or half sentence with rising intonation like it's a question?