Including Reddit's audience as "tech savvy" is an outright lie. Reddit is one of the most popular websites in the world. (And even if it weren't, it doesn't take much browsing to see how non-tech-savvy its audience is. It's basically Facebook at this point.)
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)
