"The EF has only ~0.16% of all ETH (less than many other individual ETH holders), whereas among other blockchains it's common for "the central foundation" to have 10-50%." — vitalik, after selling 11,703,994 eth

pic from the initial terms of sale. besides btc from selling 60m eth, there were two pools of 9.9% each that were later lumped into one ethdev wallet. 16.52% falls neatly into "central foundation" allocation.