As you can see, at the reduced pace of the last couple weeks, DPC would hit his estimated animation count in mid March. But he could potentially reach that mark before the end of January if he matched his highest pace, so it again comes down to how he spends his effort. On statics, his new pace would match Episode 6 by mid February and hit 4200 statics around March 12, but again, he could hit the numbers faster if he pushes.
Personally, I think early to mid March sounds about right to finish the graphics and probably most of the coding too. Add in a couple weeks to pick off stragglers and beta test and a late March/early April release seems the most likely.