PostgreSQL: More Traffic than MySQL?

MarkMail, a mailing list archive service, found that Postgres gets far more traffic in its mailing lists than MySQL. Since, January 2000, MySQL has 340,000 messages with about 3000 new messages per month. Meanwhile, Postgres has 583,000 messages in that same period and 7,000 new messages each month! You can read all of the details and see the charts here.