Once again, NBC's summer strategy of multiple reality shows has led it to success among viewers 18-49 in the Nielsen ratings for the week ending August 18. MediaWeek reports that, although CBS continued to lead the overall Nielsens this week, NBC's reality shows, which took 5 of the top 12 places, propelled NBC to #1 among 18-49s, considered to be the most desirable market for advertisers.

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