I don't buy it at that level of confidence. Robin says the Manhattan Project was an anomaly in wartime, and that past efforts to restrict the spread of technologies like encryption and supercomputers didn't work for long (I'd say the cost-benefit for secrecy here was much, much worse than for human-level AI/WBE). My reply is that a delay of 4 years, like that between the US and Soviet nuclear tests, would be a long, long time for WBE or human-level AI to drive a local intelligence explosion. Software is easier to steal, but even so.
Link: overcomingbias.com/2011/07/debating-yudkowsky.html