Gravey is a regional thing. I am Southern, and I don't care for any white gravey. Turkey gravey is up to whoever makes it. Some like it thick, some like it thin, I prefer mediun. If you know how to make good dressing, gravey is NOT necessary. This I learned from my Southern Grandmothers. Southerns eat gravey on rice.
We Southern cooks know how to feed a crowd.
Truly it is up to the cook, my cousin makes hers thin her daughters makes hers a little thicker.
Merry Christmas