A scatter plot isn't ideal to examine this, but here's one anyway. It looks to me like base models are delayed on average no more than 10-14 days, and that that's only on average. Any given base model order could easily be assigned a VIN faster than a given non-base model order. The longest delays for VINs are for base models, and they can be pretty long. There's that one guy who claimed he had to wait 170 days or so for his base model VIN.
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We've heard this argument before, and I think it's completely off base. Tesla isn't scamming, pressuring or manipulating anyone. If you want a lower-spec car, order it. You'll get it. If you want a higher-spec car, order it. You'll get it. According to the scatterplot here, the person ordering the lower-spec car may well get their car before the person ordering the higher-spec car.
Edit: Horizontal axis is the day of order, and the vertical axis is the days spent waiting for a VIN