Golang was created within Google in 2007, went public in 2009, and has only gotten widespread traction over the last couple of years.[1][2]
1 http://www.tiobe.com/tiobe-index/go/ 2 http://githut.info
Rust was created within a nonprofit in 2009, with a first pre-alpha release in 2012, so let's give it a break on popularity contests for a few years yet. ;)
While it's true that it was started then, it's also important that a stable release wasn't until 2015, so in some senses, that's also where the clock towards becoming popular starts; very few people are willing to put up with what we were doing pre-1.0, and for good reason!
I first started looking at Rust before 1.0, but the runtime and the many different pointer types/sigils drove me off. I came back in the lead-up to 1.0, and saw how much the language had improved and simplified, and started getting into it at that point.