Yet a quick look on IMDB reveals he has written just 6 episodes of Pony and his South Park credits are for two episodes
Yeah, well, Len Janson is credited on IMDB for "only" five episodes of SatAM, but even Ben Hurst said Janson was largely responsible for the first season of the show, including setting the show's general tone.
Point being that it's hard to judge this guy one way or the other.
Yeah, Janson was pretty much the show runner on the first season. And sure it was only 5 episodes, but 5 episodes out of 26 isn't bad for the series run, while Dave Polsky's South Park credit is 2 episodes out of 237.
I honestly doubt this Dave Polsky guy was a show runner on South Park or My Little Pony though. Dude is probably a freelance writer and is most likely using this two shows to drum up interest because they are probably the biggest projects he has his name attached to.
I agree it's hard to judge one way or the other, but should people be getting pumped over this guy working on a new Sonic cartoon just because he worked on My Little Pony and South Park without looking up what he did for those two shows exactly? It seemed to me people are screaming "OMG! A MLP writer on a new Sonic cartoon! SIGN ME UP!" just on the grounds of his credit to ponies alone and not checking up what episodes he wrote. Like I said, he could have written some lukewarm or terrible episodes.
And as for the South Park one, it's 2 episodes out of it's 237 total, one as a staff writer and the other for additional material isn't something to really to get excited about. I look at it like being a writer for Hollywood. I remember watching a documentary of the Nightmare on Elm Street series on the 5th entry of the series and they were interviewing some of the writers brought in for drafts. One of the writers handed in his draft which wasn't used, but the makers of the movie took one line from his draft and put it in the movie and he got a writing credit for it despite the story of the movie not being his. Some writers can use that to their advantage, but others will look at that and think "Why did they credit me for this when it's not even my story?"