Check out pgtune (https://pgtune.leopard.in.ua/#/) if simple config tuning is what you are looking for. It is probably more valuable than this blog post.
Learning about what goes on under the hood before you blindly change settings some tool spits out doesn't seem like a bad idea I'd say.
Values in the post are pretty arbitrary and useless as their comments in postgresql.conf used to be.
I am using PostgreSQL in production since 7.4 and the best source of performance tuning tips for me has been PostgreSQL 9.0 High Performance by Gregory Smith. These days PostgreSQL wiki is pretty good as well.
They do different things - pgTune tells you how to configure your system, this blog post tells you why.
Any compares and contrasts available?
I'm not running a production instance so tuning is gratuitous but nice.