Of all the things that can be worked on, the delivery fee is what the dealer ($900) is paying Kia for the car. Sure, they "could" dicker that with you, but they are just packing it in somewhere else, or have enough margin to knock off a few delivery bucks to make the customer feel they are getting their way - that's the name of the game anyway. But in reality, they've gotta pay Kia $900 regardless...
The ONE big place you want to dicker on a lease is right from the get-go. Start right at the MSRP! I HIGHLY suggest if you are a card-carrying Costco member you ask for that price. That is, Invoice MINUS $500. That IS the Costco program is dealers are going to honor their contract with Costco...
Thus, you ask to see the invoice and ask for the Costco price which is $500 below that. I'd just email them and ask for that before doing ANYTHING with a dealer. And make sure they are clear that is BEFORE any incentives factory to dealer or factory to customer, that is ONLY the dealer providing the Costco pricing, nothing more.
If it is a straight up dealer, and they say yes. Then THAT is your starting price for the lease. THEN have them take off the $4,800, $5,400 or $7,200 on a loaded GT2 AWD, lease cash, and THAT price is your Adjusted Capital Cost with which SO much will be based on.
Depending on your state, but often, the Sales Tax will be assessed on the Adjusted Capital Cost of the vehicle, NOT the MSRP. Do your homework and you can save a LOT of money. Don't, and you'll likely get fleeced left, right, up and down and 10 ways until Sunday.