coachm - 8:35 pm on Dec 4, 2012 (gmt 0)
So, since I'm back at my main haunt, I did the 410 on one site. I'll try to report back in a few weeks to see if anything happens with other domains.
Unfortunately, doing the 410 became a problem because I wanted to do a custom 410, but of all the status codes, my host doesn't allow built in customization of the 410. Also the 410 page has to be on the same domain, and because I was using wordpress on the domain, I couldn't figure out how to redirect the entire domain to the 410 and have it work properly.
I wanted to provide an explanation on the 410. Anyway, it's gone, baby.