On Friday I received a return from Hal Lanier, who signed his 1972 and 1973 Topps for me.
I sent this request in February of 2011. This is about my third or fourth TTM request that has taken over three years to be returned. I can usually tell at the mailbox if it's an old return, because the stamp of the SASE will be older. It's fun to open these requests that I've given up on receiving long ago.
I had since sent another request to Mr. Lanier in 2013, because I wanted to add his 1972 card to my set, and that request came back in about 30 days.
I sent out 20 requests last Monday, so I expect to start seeing some returns later this week. Thursday could be a big day.