Towards the end of the fiscal year they process the DV cases faster. Of course, how long it takes is still going to vary from office to office.
@Apatay, to put your mind at ease (although you should have sent the file much earlier), mitondaw in DV-2010 submitted her AOS application at the beginning of August and got two interviews in the middle of September. Two interviews because her spouse was living in a different state. So they went across the country for the two interviews. Overall her timeline was very short: