The media blitz is working. MTV’s controversial series Jersey Shore posted its best ratings to date on Jan. 7. The reality show attracted over 3.2 million viewers, a series high, and was Thursday’s No. 1 cable telecast among persons 12-34. The show is up more than 200 percent versus last week’s telecast and is also up 68% percent versus its season-to-date average in the young demographic. The show, which critics contend builds on negative stereotypes and bad behavior, follows a group of people renting a beach house at the Jersey Shore.