The audience isn't even sort of comparable to Hacker News though, so putting both in the same headline is weird. There was some correlation long ago, now not so much.
The Firefox numbers above are a much better tell of what a "largely tech savvy crowd" looks like. 88%.
Depends really on the subreddit in question. The traffic to the blog post that was analyzed came from /r/linux which should be more tech savvy than the average web user and also more tech savvy than the average Reddit user (i would put /r/linux audience close to the Hacker News audience)
The Firefox numbers above are a much better tell of what a "largely tech savvy crowd" looks like. 88%.