VividCortex/go-database-sql-tutorial — pull request #21 by julienschmidt (2013-11-30 02:29:18+00:00)
Title: Statements do not reserve connections

Where did you get this information from? Did you observe some kind of resource exhaustion because of statements?
Statements do not reserve any connections and AFAIK they also do not keep any connections open.

I've seen a lot of cases where people prepared statements, executed them once and immediately closed them again, although the exact same query was made frequently.
I think the changed paragraph motivates people even further to do things like this.