I've seen the ram drop from brewfest twice... I have the swift white hawkstrider.
But I've never seen the brewfest kodo drop.
“Do not lose time on daily trivialities. Do not dwell on petty detail. For all of these things melt away and drift apart within the obscure traffic of time. Live well and live broadly. You are alive and living now. Now is the envy of all of the dead.” ~ Emily3, World of Tomorrow
Words to live by.
Considering the fact that I've farmed brewfest since 2009 and have yet to earn either the ram or kodo...
If you can get a hawkstrider in 10 runs good for you, you have good luck. Others on the otherhand have to run it everyday for months to get it, took me 6 months running it everyday to get it on my hunter back in wrath, then in late cata i went back to farm shattered sun rep on my warrior and it dropped first run, you cant call BS on a drop chance, its a % based. Some people are just luckier than others.