I am not following you. Are you saying that you think some of the other pieces in that link could also be official album art? I so, sure, that is entirely possible.
Yes, I meant that. Not suggesting it's all from DT, but some of those city shots look very familiar.
Again, it could also be that DT was impressed with this artwork, and hired the person to create something similar for the album.
Or, it could be a total coincidence