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

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)