SEASON PREMIERE: This dance-competition begins Season 11 tonight, with a tweak in format: After two years of pronouncing male and female winners, as in the Oscars, it’s reverting to an overall winner, as in American Idol or Dancing with the Stars. And while many of those shows have lost some of their spark over the years, So You Think You Can Dance maintains its energy levels, largely because, year in and year out, the outrageously talented contestants do the same.