Based on the write-up? Regardless of language choice, I thought the analysis was pretty honest and the data suggests they did indeed engineer a solution worth being proud of. Did you get beyond the title?
Would be interesting to have an app that display stats and trends about technologies hitting HN homepage. Regardless of any astro-turfing going on or other shenanigans. But it's true Go somehow gets a lot of exposure on HN, not unlike Nodejs a few years ago, or Rails before. Funny how people seem to discover hot water each time a new technology/hype hit the IT world. Soon one will read "How we went from 100000 LOC to 1000 by switching from Go to nim/crystal".
Indeed, think the solution probably did most of the work here, although Go's channels would have made it a little easier to implement.