I've converted from MySQL on previous project to MongoDB then to PostgreSQL with my current project, and I have to agree that the time it takes to get up and running with Postgres is still a bit behind MySQL.
The user permission system, the file-based authentication, the strange backslash command structure, the "no feedback" nature of the replication solution vs. the status report in MySQL all make Postgres a lot more "newbie unfriendly".
s/My/Postgre/
Seriously, on any platform you might reasonably use in the last five years, PostgreSQL is in the package manager, and installation is one command, just like anything else. Some packagings even create an initial database for you; for those which don't, it's just:
I think the PostgreSQL manual is very good. The one weakness that i can see is that there isn't (that i know of) a single-page soup-to-nuts getting started guide for someone simply using PostgreSQL locally. There are blog posts which do the job, but it would be nice to have something official.