What color did you get? The panel warping is most likely present in every model where there is a space for windows but where windows have not yet been installed. When the sun hits it right, you'll see it on all the vans in these areas, but more on darker colors. If you look more closely, you will see that the "warp" is just the metal in these areas coming together at reinforcement pieces. By looking inside the van at the sheet metal, you will see these pieces coming into contact with window reinforcement metal pieces, lateral reinforcement pieces, and rib pieces everywhere you see a "warp".
In some lighting, you will swear it's straight and flawless, in direct spotlight of rising morning sun hitting you broadside, you will look away in horror. lol