I don't think this'll work. Airlines who have the most to gain from a short boarding time (budget airlines) have another approach, where they do not assign seats. Individual passengers are motivated to board quickly because they don't want to be sat next to a big fat person, or they want to stay with their group.

Ryanair has an average turn around time (time between when the plane lands to when it takes off again) of 25 minutes. I've been passed through the gate and waiting at the door before the plane I've to travel on has landed.