The big difference is Go has Google+Pike pushing it and might actually get widely adopted. I don't think it is just that. There is also a difference in culture

The big difference is Go has Google+Pike pushing it and might actually get widely adopted. I don't think it is just that. There is also a difference in culture and tradition. Roughly, Go fits more in the C and Python tradition, D and Rust fit more in the C++ and Haskell tradition. Simplicity versus formal correctness. I think the Python/C pond is just larger than the C++/Haskell pond.