In case anyone is still reading this and is interested: http://www.enterprisedb.com/postgres-plus-edb-blog/marc-linster/postgres-outperforms-mongodb-and-ushers-

In case anyone is still reading this and is interested: http://www.enterprisedb.com/postgres-plus-edb-blog/marc-linster/postgres-outperforms-mongodb-and-ushers-new-developer-reality http://www.enterprisedb.com/postgres-plus-edb-blog/marc-lins... shows that as well.