Point of correction it was stated previously that the target (at least for NA) was to get around 2 months and later further clarified that he would like to see wait times measured in weeks not months (indicating something maybe closer to the 6-8 week range as opposed to 2+ months)
Your overall point stands, a dropping wait time isn't necessarily a bad demand indicator because it could just be that they are finally playing catch up to the current demand levels. If they need to massage demand a bit to get the numbers up a bit higher then I am sure they will do that. Elon mentioned he has a secret weapon for demand should it become necessary. But we still don't have any traditional advertising happening. When I start seeing ads like: (in your best southern accent... not sure why they are always southern, but they are) "Come on down to your local Tesla dealer 'cause we are havin' a blowout sale for Pa'ddie's Day weekend! This Tesla right here, originally 69,999 now SLASHED to 59,999, and this Tesla 89,999 now SLASHED to 84,999! We take all trade-ins! You drag it in and we'll give you top dollar! No Haggling! Bad Credit? No Problem! Come see what we can do for YOOOOOOOOOUUUUUUU!"
Ahem... sorry... had a moment there.