There have been a few videos by hardware reviewers to address the sample size concern. Gamers Nexus tested 3 different CPU models with 20+ CPUs each and found that the biggest variance from lowest to highest performance was under 4% while performance variance in most cases was about 2%
https://www.youtube.com/watch?v=PUeZQ3pky-w
The way CPU manufacturing and binning are done means that cpus in particular will have very minor differences within the same model number.
Not sure how lemmy compares but it isn’t unusual for user generated content online to follow a 1:9:90 distribution of posters, commenters, and lurkers. Just look a the number of upvotes a post gets compared to the number of comments it has and you can tell that most people who vote dont also comment.
I rarely comment because internet discussions tend towards arguments. I usually just upvote comments that already say what I was going to comment anyways.