It no theory.
Compare the first three DWO's in the pic compared to the last two. The white and gold came from mansionhousemanor, and the first silver one came from a M2M deal on one of the forums. Of the second two, the silver DWO on the right is made from one of JMB's water slide decals and the other white one came from a sub (of unknown origin) I swapped for a BK in another members watch.
Look at the first three. The numbers get progressively closer to the inside of the overlay in the teens, are the closest in the twenties, then move back out. Just look at the 1's in the teens.
Now compare that to even Polexpete's overlay - nice and evenly spaced.
http://www.ebay.com/itm/ETA-movement-part-date-disc-silver-2824-2836-2893-rolex-oyster-date-/121587655451?
Pretty hard to center up a DWO that isn't concentric in the first place.