According to John Gruber:
This is actually what I suspected. I never thought a gold iPad, especially the larger size iPad would look good. Gold is OK in smaller sizes, IMO.
http://daringfireball.net/#fn3-2013-10-26
One other thing the 5S offers that the new iPads do not: a gold option. My understanding is that they tried it, and it just didnt look good bigger. It works on the iPhone because the iPhone is so much smaller more like jewelry.
This is actually what I suspected. I never thought a gold iPad, especially the larger size iPad would look good. Gold is OK in smaller sizes, IMO.