Captains set the tone.
If the pairings are not revised and the GT is not changed - nothing changes.
When the jet is loaded and the crew is ready, then push at Captain's discretion.
Ops normal, nothing changes regardless of the intent to push/pull 10 min early.
When the union chimes in, I'll consider an adjustment. Until then, don't expect my crew to rush because temps are high in MEM. They'll play this game during peak as well ... it's cold so people move slower so we need to push/pull 10 early as well. I don't support the precedent until my pairing reflects the change and the trip is revised.