It's just "Go". The way I usually describe it is "the sweet spot between C, C++, Python and Java", which, considering who worked on it and where they worked, seems to be closer to reality than just C.
That's fair, I haven't tried D yet but I've heard good things about it. One thing Go's really good at is web services, and from what I've seen D seems to be a bit lacking here. But in general D seems more versatile than Go.