LORELAI: I mean it’s an adjustment of course, but she’s always wanted to go to Harvard and this is how she’ll get there.
LORELAI: Yeah. Ever since she could crawl, I’ve really wanted her to go there.
As we have suspected ever since the Pilot, it was Lorelai’s idea for Rory to attend Harvard. Here she admits that she has been longing for Rory to go to Harvard since she was a baby.