My Better half....
Just to let you know that my better half having worked on both the B737 and the Airbus suggests that with more space becomes more baggage, more duty frees. If the paying public have more room to manoeuvre then surely you're inviting them to bring more garbage and therefore take more time to disembark.
By the way, 11 mins to turnaround a B737 with a full load I don't bl***y think so!