Some grumbling from our back room about quick white also, we were thinking seasonal temp change but our furnace is still coming on at night, so it has not warmed up that much.
We use about 5 gal every 2 weeks or so, the one we just opened has a mfg date of 10/8/14 & batch #4977722.
Does this match up with anybody else's numbers?
~Kitson