Like metioned here:
http://www.tacticalgamer.com/battlef...-reminder.html
Bleed rate is a factor of the percentage of flags you own. On 5 flag maps like Shuhai Taiba it's not so critical to get that last flag to turn over. In 3 flag maps like Verdun, I can't say the exact speed, but I can say bleed is a critical factor in winning the game. In Tunis I can't be certain, just because of the high rate of attrition from regular infantry death.
I have a couple commander sessions recorded, to get a better anwer, I'll record some more and try and calculate the exact ticket countdown time based on the flags that are owned.