I got an email from GameFly yesterday, indicating that "FastReturn" is now available in my area.
Apparently how it works is that, when the local post office scans the barcode on the game I'm sending back, it sends a confirmation to GameFly, and they send out my next game immediately, instead of waiting for the game to actually arrive to them.
Seems like something that could dramatically cut down on turnaround time. Logan and I already get decent turnaround time, living in California, but improved = even better!
From what I've seen on Google, I guess it started last month in some areas or something.