I'm thinking it is a purely coincidental that my warre hive produced 1.6x more honey than the Langstroth next to it
whoa, whoa everyone. That was my bad attempt at sarcasm... Golden Rule - 1.6
Do you use removable frames in your Warre?
Nope, flat bars. The warre bars are short enough that they don't seem to curve the comb, and with the space between them, centering the comb on the bars doesn't seem to be an issue either.
robo, i'm curious if in general you find hives next to one another produce the same ammount?
Nope, every hive is different, depending on the strength and population. Some yards will be better than others, but there can be quite the variance in a given yard.