(Using figures cited in the article) Assuming that most of the time only 20 machines are responsible for ID generation, and ~50% of tweets use the first available sequence number for a given millisecond (so half the time machines only process one new tweet per millisecond), can we estimate Twitter's new tweet QPS average to be 20,000?

Edit: actually this is an upper bound for the 50% because it assumes that every machine processes a tweet every millisecond, which may not be the case