Etreus (and all others waiting),
It took the adcom 5 weeks to extend an interview invite my way. After three weeks of waiting, I thought the process was over. It's now been over a week since my interview went complete and at this point, I wouldn't be surprised if I had to wait another week or even longer.
I have no idea how many applicants apply ED, but I think the overall pool is 6,000+ applicants. Even if a quarter of the total applicants apply ED, I'm assuming the adcom has an extremely difficult and time consuming task sorting through all of these seemingly awesome applications and qualified people (I counted at least 3 folks here with GMAT's in the 99th percentile -- I'm blown away!). One could imagine the adcom office has no more than 10 people (just a guess) and 1,500-2,000 applications to sort through (?) over the course of 6-10 weeks --- if the adcom is really giving each applicant deep thought and consideration, it's no surprise that interview invites are staggered over time as the adcom gets to them.