Canada is (as good as) fully invited to configure : 85% reported receiving an invite. US is also nearing completion : 80%.
Those numbers are biased in two ways : some people may not report having received an invitation or have not found out yet they are already invited. This leads to underestimation. At the same time, some people may be unlikely to report a mere reservation but would report an invite. This leads to overestimation. All in all, I think both biases will more or less cancel each other out. This makes the numbers above pretty plausible. Also, even though reporting creates a self-selecting bias for some statistics, it doesn't for estimating who got invited : Tesla does the invitation and presumably does not care for any factor that may correlate with the likelihood of filling in that form (ie, self selecting).
There are 500k reservations worldwide. Let's assume roughly 60% of those originated in North America (Canada+USA basically). That's 300k reservations. 80% of those is 240k. Tesla is still predicting a delivery time of between 4 and 6 weeks. That means it estimates being able to produce all invited customers that actually order within that time frame. Let's say by early june or 10 weeks into Q3, 1 week of shutdown makes production run for 9 weeks. At 2500/wk on average and 12450 already produced in earlier quarters we have a total production of roughly 35 000 Model 3s by then.
This gets me to a current take up rate of about 15%. Agree/disagree?
One other mechanism (not relevant for the above but maybe for further analysis) : I suppose most people will only fill in one report even if they hold two reservations. This is due to the way to input data works : the question for the second reservation comes only at the end of a rather long questionnaire. Many posters will be fed up or have skipped over the latter questions because they aren't yet relevant to them. At that point they may very will just want to get it over with and answer in a way that gets them finished in the quikest way (by not detailing their second reservation)