I read this LJ post, and can tell you that the DFI and Lorelai's house sets on Stage 18 at the WB are alive and well. They have not been torn down. Yale is still partially up but I imagine will come down as they won't need that set for Season 8 anyway. The Gilmore Mansion is still there as well. So please don't get depressed over these kinds of reports. Keep the faith!