Sydney- At the half-way point of the Australian 2007 ratings year, the Seven Network has an unassailable lead, finishing No. 1 in all-people in 18 of the 20 weeks surveyed, and coming tops in the 18-49 and 25-54 demos in primetime. Seven also boasts six of the top 10 regular programs in Dancing with the Stars, Border Security, Surf Patrol, It Takes Two, Seven News Sunday and Grey’s Anatomy.The others are Nine Network’s Sea Patrol, RPA and 60 Minutes, and Network Ten’s Thank God You’re Here . Trying to put the best spin on its results, Nine claimed it had secured all- people wins for the majority of days, namely Sundays, Wednesdays, Thursdays and Saturdays. And Ten said it had won its targeted 16-39 demo in primetime.