No, Ted, I haven't tracked backlinks for the competing sites, if that's what you mean. Some of them came out of nowhere to be on the first page.
One phrase I lost position on was "[name of a state here] widget stores." I was #1 and #2 for that phrase for probably four years. Now I'm #3 and #4. At #2 is the site for a widget manufacturer, but they're not based in that state, and there's nothing on the home page of their site, which is what's shown in the results, for that particular state.