The idea makes sense in the abstract, but I don't think I've actually heard any young people talking like this. On the other hand, I'm not completely sure what "this" is really supposed to sound like.
One plausible theory is that the final consonants released into schwas for emphasis would be like the performance style of certain preachers:
But there's nothing "new" about that — and someone I don't see this fervent style translating into Sara's icy put-down of Jermey's childish display.
Another alternative would be the somewhat prissy released final consonants -especially stops — that one sometimes hears, either as emphatic hyperarticulation or as a general affectation. (I haven't found any clear examples in popular culture on the web, but I'll keep looking, and maybe a reader can point us to some examples.) But I wouldn't expect to hear this with a final /l/ as in Pierce's comment.