Sean,
Not sure I am wrong simply because a four-ball starting at the same time will, by necessity of the game, finish at the same time. Consecutive two-ball group add more stop/start points, especially at the green-to-tee off transition, and there is a necessary delay in waiting for the group in front to clear. Flow is about getting people in and out in the most efficient manner possible.
My major issue was that Bryan sought the tee time behind the groups of twosomes on the tee sheet, and then assumed something of those groups in front. Six players had to get through the golf course that afternoon, and with their being the cap of sunset, the most effective way would have been for one of those groups to make a foursome behind the twosome.
As in traffic situations in your car, often times what appears to be best way from the driver's standpoint is not the best way as far as the system is concerned.
I do notice, however, an increase in the practice of not allowing a faster match/group to play through. At a golf course I really enjoy playing, I've had the experience numerous times of being told to jump from the 8th tee to the 11th tee in order to get in front of a group holding my own group back, instead of simply playing through the group. So with that, I can relate a bit to Bryan's frustrations.