I'm pretty sure that part of the "discrepancy" is because the EFA closes earlier than our domestic markets (Between 1 and 2pm). Since the dip came after that time we ended up with a gain.
I'm betting that today's big uptick will not be the closing gain we see (about 1.4%), but closer to .9%, thus factoring in the drop in the market yesterday (not to mention any "fair valuation" computations).