[Later that night, Rory walks into her bedroom, turns out the light and tries to go to sleep. A moment later, she turns the light back on, grabs her Yale brochure from her night table and starts reading it. Upstairs, Lorelai is reading the same brochure in her bedroom.]
The episode ends with both the Gilmore girls reading a Yale brochure, so the viewer can tell that Rory is now seriously considering applying, and Lorelai is also trying to get used to the idea.
The application deadline for Yale is immediately after the New Year, in early January, so Rory has time still to put together a good application.