In 2002 my average return for an autograph was 87 days. The longest was John Henderson I sent it 11/13/02 I received it back in my mailbox 9/22/06 for a total of 1,409 days.
2003 the average return was 64 days. The longest was Darren Daulton 891 days.
I'll be adding the rest of my return rates later.