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I received the thank you email last night and just checked my tesla account and they added my confirmation numbers for each of the 2 reservations. No sequence numbers listed yet.
I registered at the Tysons/Tyco Rd. location just before 11am. I got my AmEx card transaction confirmation immediately but still waiting on the tesla email. I was about #80 in line at 8am. Counted over 200 in line at one point.