the thread about this on bleeding cool devolved into an argument over Snyder referring to himself as "head writer" of batman. Honestly, I think the guys who had a problem with the term are the ones who actually place too much importance on the label.
Snyder and several writers (including Gail Simone) confirmed that it's what they call the current writer of the flagship title over at the bat books, as the continuity in the flagship title usually take precedence over the satellite titles during continuity conflicts.