I think there will be more selectees for DV2013 in October 2012, and i base my belief with the following:
1) An immigration lawyer in Michigan told me that at least for the last 3 years there has been some left over DV visas that expired and didnt get used by any immigrants. Now these visas might be for some or all categories of DV, meaning they might be for AS, AF, SA, or all of them i am just giving an example. But the fact is the numbers do show that there were available visas that didnt get used.
2) DOS and USCIS dont do things just for the heck of it.... meaning. They know what they are doing and they seem to have anticipated that having a second drawing is a good idea to use up the unused visas.
3)Good things happen to those who wait....and i am sure alot of us are waiting