Tonight, season 21 of Dancing With The Stars premieres. The long-running competition series isn’t as strong as it used to be, but it is still a solid performer or ABC. Last September’s premiere, which was also a week prior to the official start of the season, garnered a 2.4 adults 18-49 rating. Last spring’s premiere earned a 2.1 adults 18-49 rating. How do you think tonight’s premiere will fare?