I totally understand what you are talking about. His voice has not only gotten lower, but just recently has gotten, well, just different. It's hard to explain. It just sounds different. I wouldn't call it an impediment, though. I would like to hear him talk as just himself, not as malcolm, to see if it still shows a lot then too. I don't know if anyone has ever noticed, but Frankie talks a little different in real life than when he is acting as Malcolm. He's a little more forceful sounding when he's playing Malcolm.