I think this is true for most communities as they mature. Issue-of-the-day become more prominent as core topics get discussed to death. For example, I notice a few people pointing out the higher number of Golang articles that get to the front page, however, this is more due to there being more development and discussion as v1.1 was just released. For other programming languages most common experiences have been share…
I don't think that's all there is to it. There are any number of programming languages at a similar level of maturity and popularity to go, but go gets a disproportionate number of stories on HN. Something is distorting the voting.