I requested a trade in of my M3P for an LR and got the final value confirmed today - ordered the new car on 1st Feb.
Not been given a delivery slot yet - showing as March on my account.
Per others above, when I spoke to them over the phone they did say that they have been inundated with trade-in requests, and if it's a non-tesla then it's taking slightly longer to process but they aren't favouring tesla trade-ins over non-tesla - they're just in a queue.