Have not tried yet, but thanks for the link! Salt seems to be comparable to Mcollective - except, where Mcollective uses middleware (ActiveMQ or RabbitMQ or Apollo) which comes with its own server (broker), Salt uses ZeroMQ, with a built-in broker.
Actually, ZeroMQ is brokerless by design[1] which prevents a hop in all communications. The design is slightly more complex, but the speed increase is very real.
