No, there could be a lot of things going on. First off, for certain they won’t be selling any Plaid+ models for at least a year, so if they can get those buyers in a 2021 Plaid they are pulling revenue forward. Also, Plaid has no serious competition, Plaid+ might by the time it arrives, so a bird in the hand vs. two in the bush. Lucid and others will have products out and those Plaid+ orders might fade away.
I would doubt they produced more Plaids than they have reservations for. At this point they appear to be building to order, even if they have a few additional they can send them out as demos to the retail stores. Anything more than that you’d think they’d be trying to convert LR orders to Plaid and no one here has mentioned they’ve been asked to do so.