At first, I was complaining about how the 4Kids actors do the games now.
I still don't like it, but it's not as bad if Sonic sounds like he did before.
(But are you sure? I read somewhere that Robotnik in Sonic X sounds like he did in SA,
but I can hear a big difference. Also, he's usually more annoying in Sonic X.)
About Jet sounding like Sonic, it must be like when Robotnik sounded weird in Sonic Adventure.
(After Amy gets through the Hot Shelter, he says, "Where do you think you're going, Amy?",
and he doesn't sound very much like himself until he says "going".)