You can hit Education before t90 without this exploit with both the Maya and Babylon. I think t80 even. Not disagreeing with you here, but in one of my test runs with the Maya, I hit t92 Education without bulbing a GS... purely from pyramids, libraries, early NC & trade routes. But, agreed, it definitely blows the game wide open. Now would be the time to get those Deity achievements that people still don't have. I think where it's really broken is with Scholars in Residence allowing you to complete the whole tech tree by t200 without universities... I'm hoping that if we keep posting about it, the devs will notice and fix it. In the meantime, I'm enjoying playing Atomic Era units in 1000 AD.