Lucky you
When did you file? Is there a military affiliation to your application? Those tend to go faster.
I do check my status online, no changes yet. When it first changed to in line for interview on July 30th it said if I didn't receive an IL within 30 days, to call the 800 number. After 31 days, I called. They told me the DO had 15 days to respond, I never heard anything back but during those 15 days, the blurb on the website changed to, "if no notice after 90 days..."
I called on Oct 29th, 91 days... they told me it had only been 89 days, to call again the next day (!!!!). Called again on Oct. 30th, the agent told me they had responded to my prior phone query on Sept. 4th. I never got the email - and I'd been watching for it, even checking my spam filter. Agent suggested I book an Infopass, as my GC expires on Jan 3rd and so does my driver's license and I can't renew the driver's license if I don't have legal residency status or citizenship. Went for Infopass on Oct. 31st, got my passport stamped for a year extension so I'm good there. I was also waiting for word to travel back to Canada to help a relative who was waiting for surgery - I was worried that either that would conflict with my interview date OR I'd have no green card if my travel carried into January. So my Infopass took care of that. My Mom had her surgery about a week later, and I've been back in Canada for 9 days, headed back to ATL in the morning... so that all worked out with no conflicts.
When I spoke with the agent on the phone on Oct. 30th, the email I never got on Sept. 4th said that I should have an IL within 90 days... that puts us around December 4th or so (give or take a day for Oct being a long month...) I'll check the calendar to see just when 90 days is from Sept. 4th.
On Oct 1 I got a yellow letter dated Sept. 27th, asking me to bring my driver's license or state-issued ID (and nothing else).
At the Infopass the agent there said that at the time (Oct 31st) they were seeing May filers for interview. He said I should have IL within 60 days. Might be less but he didn't like to say anything sooner so people don't get irritated. He said it might come in 20 days... well that has passed, now that it's Nov. 26th with no update so far.
I suppose there's a chance that the website hasn't updated but an IL has been sent - I've heard of that happening... I'll be home tomorrow afternoon so I'll go through the snail mail, but my better half at home knows I'm waiting for this so if it had come, I'm sure I'd have been told about it.
There are plenty of others in Atlanta that filed just before or just after, who are also still waiting, so I would say your speedy process was good fortune for you, but doesn't seem to be the rule.
At this point, I've got my paperwork in order to be able to renew my DL and travel if need be til Oct. 30, 2013 so other than just wanting to get it done and over with, there's no longer a huge urgency. Initially I'd hoped to get through the process in time to register to vote, but that ship sailed months ago. It just is what it is.
Today is 150 days since I mailed my application. June 29th. Priority Date is July 2nd, so next week will be 5 months in the