to Pedro
Fastest mail by order;
1-Express mail -arrive the next day.No matter how far is going to.
2-Prority mail -depends how far is going to;may take up to 5 days to arrive.
3-certified mail - depends how far is going to:may take up to 7 days to arrive.
After receiving your mail,your case is updated the next day.
Good luck.
P.S:certified mail is a regular mail with a receiving confirmation(You will receive a green card stating that your mail has bee received.
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Timeline:
RD :aug 22,2001
Fingerprint :Jul 27,2004
RFI :Jul 21,2005
RFI received by uscis:08/09/2005
Bio :Jul 25,2005
Bio done :08/10/2005
RFE(I-602"False document",1 year presence,Travels) :Aug 30,2005
RFE received by uscis:Sep 07,2005
Approved Sep 15,2005
GC received Sep 20,2005(Backdated Sep 15,2004)