Hi Again,
I've been endeavoring to keep this spreadsheet up to date, and recently went through to see how many of the gaps may be due to people who just don't post on the message boards anymore. Keeping that in mind, there are very few signatures who have not gotten a delivery window--specifically:
236, 698, 957, 1013, 1136, and 1278.
I have not looked at these people's configurations yet to see if there's anything in common.
This is out of 197 Sigs and SSLs who have checked in in total, and 6 who haven't posted in months (M.I.A. in the spreadsheet). The percentage of those not contacted with a delivery window who are on this forum (net of M.I.A.s) is a remarkable 3.1413%. It's mostly remarkable in that it's essentially pi (π).
Assuming 1000 US Sigs, we can expect that approximately 31 have not been given windows yet.
Being able to figure out stuff like this is the reason I wanted to include people without windows yet in the main spreadsheet. I guess as long as this isn't done, I'll keep trying to maintain mine. I may lose interest after my car is delivered, though!