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.
Go's search for simplicity is seen as a solution looking for a problem in the language design communities.
But most programmers are not in language design communities. There is a big potential for a 'safer C' or a 'faster Python'. Yes, that's a simplification, but also how people will see Go.
Not really given that I think you're missing out on the advantages of Go, looking for the wrong things and generally missing the point of the article entirely.
And yes, I have. Hence my comment.
Er, you weren't the GP, sorry, but my point remains, though somewhat directed a cjensen.