“We’ve heard so much about you”

PAUL: Oh man! Mom, Dad, that is Luke.
DORIE: We’ve heard so much about you.
SID: Darn shame about that Rachel.

Now we discover that Lorelai spent a lot of her date with Paul talking about Luke! Not only recommending his business, but also discussing his relationship woes. No wonder Paul quickly realised he and Lorelai were better as friends.