The primary fact is, the data their working with really lends itself to a more relational data store than non-relational. they can leverage traditional SQL dat

The primary fact is, the data their working with really lends itself to a more relational data store than non-relational. they can leverage traditional SQL databases and achieve vast performance improvements by taking advantage of PostgreSQL's built in relationship handling This is not unique to postgresql, but is more a property of traditional relational databases.