I think the 8-week notice is fairly standard, but there can be other delays. Depending on your location to the factory, it will need to be delivered to the dealership and the dealer needs to conduct their PDI and prep before they can walk though with you.
Ask your sales guy to provide you with updates if possible. For example, they should be able to tell you when it is actually being built as well as when it comes off the line.
A couple of years ago, I had ordered on March 15th anticipating around May 15th. We picked up on June 2nd. The delay was a driver shortage that year along with a holiday.