First TTM requests sent

So I finally sent out my first batch of TTM requests yesterday using players' home addresses from Harvey Meiselman's list. I focused on some modern era players that I had Orioles cards of, but was never able to get anything signed at games.
I sent requests to Kevin Millar, Eli Marrero, Scott Williamson, Andy Van Slyke, Jaret Wright, John Halama, and Cory Doyne. No huge names, so I hope to get a couple of these returned to me.

For all you seasoned pros at TTM collecting, how long do requests take if they are sent to a player's home address and they are still actively playing? I feel like it might take quite a while.

I've also been buying up some older O's cards from guys that played in the 50s and 60s to get sent out next week. I imagine that the success rate with the older players is probably higher than the modern-era guys since I doubt they get as many requests. Or at least that's what I'm hoping...