I myself was on the platform for the short period between 745am and 750am or so. I came onto a basically empty platform except for a few riders like myself who just descended the escaltors. A train showed up within 5 minutes with room enough for the hundred or more riders that had accumulated in those few minutes.
As the WIRE Bulletin posited it is unclear if the lack of riders was due to many staying home due to the excessive heat predictions or other factors. The real question is how was the platform between 815am and 845am which is usually the heaviest period of traffic.
Based on this morning I would advise all resident commuters to leave earlier than usual to ensure a stress free ride as much as possible.