Yeah, that sounds pretty close. Depends on how long you intend to grow them out, and how long you intend to veg the clones.
Figure you can take clones in about 4-6 weeks. Of course, you'll probably only get 3 or 4 clones off each when they're that small. Then you should veg the clones for about 6 weeks, and it'll take 8-10 weeks to flower. If you add in 2 weeks to cure . . . you're smoking 20-24 weeks from now. That's mid March to mid April.
You shouldn't be too impatient with the Veg stage. The bigger it is, the more bud you'll have. Of course, a lot depends on the size of your room, the amount of Co2 it's getting and the amount of light. But basically, if the clones are only big enough to hold an eighth . . . that's about what you'll get out of it. Plus, the clones have to have a root system that's established enough to suck up water when you flood.