Title:
I kind of got the impression that Jun doesn't really know what Paul's really like. He only mentioned having seen him in the tag battle tournament thing, not that he's met him personally - so he probably doesn't know how he treats his pokemon, and just thinks he's a great trainer from the fact that he's a strong battler.
Either way, I totally loved Jun in this episode. I was kind of worried that they wouldn't portray him as cool as he is in the games (he was always my favourite of the rivals!), but I think they made him even better. They really brought to life his impatient, hyperactive personality from the games. Loved the way he kept counting down for people to do stuff, and of course the way he kept crashing into Ash just like in the games. =) I also hope he becomes a recurring rival - to be honest I have to wonder why it took the writers this long to introduce him, because he always seemed so fitting as a fun character who'd really suit the anime, and be a nice change of pace from Paul (don't get me wrong, I think Paul is a great rival character too).
I have to agree with Habunake that the animation was really great in this episode too, especially in the battle between Jun and Ash. It was fast-paced and full of action, yet they still got in so much detail in the pokemon and their moves. Very cool.