They nailed it on the head, especially with the member berries.
I haven't watched any of the new episodes, I actually sort of fell of with South Park after whatever season had "Medicinal Fried Chicken," and the parody of the Jonas Brothers. That was while I was in sixth grade, although when some of the older episodes ran on TV, I would watch them when the opportunity came up. I think part of why I've lost interest in the show is that, while the comedy was always partially dependent on parodying things going on in the world at the time, the show has actually become too politically charged for me to enjoy it. I might just not be giving enough of a chance, but once the show steered away from being more "Just a bunch of dumb kids doing stupid things," and more towards having a structured agenda, it lost its charm to me.