Is Drupal 8 with PostgreSQL supported? Is the new Drupal 8 supported/certified by the Drupal community to run on PostgreSQL?

This is the top hit,

https://www.drupal.org/node/2157455

I don't really know what that means here in the Open Source part as the majority of support is MySQL (or so it appears).
it works and its even blazing fast.

tested on 

drupal core 8.3.7
postgresql 9.6.3
amp stack - XAMPP


drupal case to follow on postgres drupal integration
https://www.drupal.org/node/2564307