“With the notable exception of ABC’s “Dancing With the Stars” — by far the summer’s biggest new hit, with an average of 16.8 million viewers — the six major broadcast networks have slogged through a disappointing summer, with household viewing down about 6% compared with the same period last year. Among the advertiser-friendly demographic of adults ages 18 to 49, the slide was even worse, off 10% according to figures from Nielsen Media Research.”