as far as I know from the gardeners I hang with, yeah, not much yeild, and it's a tough little plant to upkeep. but it's really worth it if you flavour it right (bubble, orange, fruit loop) and this is second-hand information, so don't hold me to it. -Aurora
i've grown masterkush. it was fairly easy. i can't tell you much about yield. i grew it scrog and harvested early. seemed pretty good yielding. i know bubba and og yield poorly.
that info helps me as well, I remember now, flavouring is what most people do to kush strains, but flavours straight-up kill yields. it has something to do with the actual process. as I said before, it's completely worth the effort.