<< From where I sit at my keyboard, I still think the most important things to do to change the user experience for Wikipedia editors is to change the editing culture a lot more to emphasize collaboration in using reliable sources over edit-warring around fine points of Wikipedia tradition from the first decade of Wikipedia. >>

Completely agree with you. Also agree that fixing culture is often harder than fixing technological scaling problems!

All that said, kudos to Wikimedia Foundation for addressing the speed issues for uncached pages. Great work!