Yozozo claims on the forums that he is able to complete 17 keg runs for the Alliance version of the There and Back again quest for Brewfest and is backed up by others who say they complete an average 15 keg runs per attempt. On the Horde side, 11 to 13 seems to be the average for the high achievers.
I've run the quest on both factions, and it does seem easier on the Alliance side even though the Horde version has more apple barrels. Is it shorter? Is there a better time bonus? Are the goblins wearing Dwarf masks a handicap? Or is it just perception?
I definitely think the Barker quests are easier on the Alliance side. The Ironforge course is in a complete circle without any backtracking and you can jump down the mountain a bit to cut the circuit short at the end. You have to backtrack a little in Orgrimmar and there is no shortcut to the Horde quest-givers.
What is your opinion? Is there an Alliance bias for the Brewfest quests or are the Horde just worse at motivating Rams?