He compares PostgreSQL (Open Source) to MS-SQL (Proprietary) for one feature (initial setup), but I don't see him comparing things like sqlplus (Oracle/Proprietary) to psql (PostgreSQL/Open Source).
What conclusion did you expect I'd draw, had I compared those two? I have zero experience with Oracle, and copious amounts with both PostgreSQL and MS SQL, so I was focusing on things I actually knew about.