The only thing I could see it being is due to your location. *edit* Or, Or, Or....
For instance if you are farther away from an IW/Deconsolidator thats more time for that freight to get to you and then to the store vs hitting the closest DC and getting it on the road that much sooner, (im guessing those local stores may be more high volume).
Also some trailers(cans) can't leave the state they are registered to, so instead of the deconsolidator/IW swapping freight from a can to an actual trailer to send it to your DC they just send it to the DC in state to avoid extra handling.
OR! those stores move more specific large items that in the long run make it more efficient in a long term manner.
OR! it has to do with the price of the carriers.
If you really want to min max with things like this I could totally see why considering all the price factors that come into play, it's just very algorithmic though which target doesn't seem to do very often. So uh.. I duno for sure.
In conclusion I'm not sure why I haven't gotten my bachelors in something stupid like half the GL's that walk through the door and gone on to something better : P