That's 3 minutes per question, given the half hour he allotted. I don't think that's too disappointing. Did you really expect him to answer 12,000 questions?
For perspective: I read a bit in the most recent New Yorker describing a fund-raiser dinner with the president; it was $50,000 a plate and the president had one hour which equated to 1 minute per person. His staff knew he wouldn't have time to eat so he was prepared a meal he ate quickly in the kitchen beforehand. A staffer with a watch would tap him on the shoulder every 5 minutes when he needed to move onto the next table.
