It sure is fragmented - I've actually been on GW, where many of us started out together - Susie, Barb, Detrick, Awanda, Usha, Jim D., Eileen, Lynn R., Becky, Dann L., Lazygardens, Grant, Susie bird lady, Sharon (x2), Judy B .... I see some on GW, although it is mostly Phx newbies asking questions and then gone. I still am in touch with a few on Facebook, as well - Barb, Alan, and a few DG friends from out east.
Kind of a discouraging state of affairs - there's some that just don't want anything to do with gardening forums and concurrent drama.