This will probably make the biggest difference on the east coast shuttle markets and certain other DCA flights.
Saturday flew LGA-DCA and was number 9 / 18 on the list as a Diamond on a Q fare. On the return Sunday May 1st was 2 / 30 on the same Q fare. Finally I got to be ahead of all the corporate Y fares. BTW.. still didn't make the upgrade. Flight was full with media honchos returning from the White House Correspondents' Dinner.