Time release capsules put down this time of year are still there in the spring. At that point, I don't consider it a Winterizer, but rather, an early spring app.
I prefer September/October for winterizer so it actually gets into the turf and is used b4 the ground freezes. We average winter freeze-up of the soil around Thanksgiving, unless there is heavy snow cover b4 it freezes. Give or take a month or 2.
Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage,,, I wonder what does...