I ordered my F250 XLT on April 6th got the confirmation email same day. Priority code 14, which is weird.
To the absolute best of my knowledge the only change to the interior of the XLT trim was the deletion of the tan/camel color option, which really got my nose out of joint cause I thought it so pretty with the Rapid Red. And to rub salt in it, I was waiting for a real estate deal to close to fund the truck purchase. The last day to order a 21 (with tan interior) was March 15 and the deal was signed April 1. Dang it!!
According to order guides about the only change to XLT was the color deletion, and a blue paint color was changed and a gray was deleted.
I don't think you could tell much difference between a 21 or 22 XLT sitting side by side.