So the August Visa Bulletin is out, showing DV Visa cut-off for September 2018 as being 1450 for the OC region. To me, this means that for DV Visa Program 2018, only those with numbers xxxxx1450 and below will be interviewed, total. Some simple math (1450 / 12) shows that for the OC region, that equates to 120 @ month.
So, assuming the rate of interviews for 2019 is similar to 2018, we should see OC interview invites being at 120 per month:
Oct = xx120
Nov = xx240
Dec = xx360
Jan = xx480
and so on...
Someone please step in and let me know if I'm way off base.