It's not impossible.
Jupiters went on sale June 3rd and the first ones delivered were October 2nd so 4 months
If they kept the same timescale that is late march
*fingers crossed*
That was with a mature 28nm process that everyone uses. 20nm is a whole new story. TSMC is going to have their hands full making 20nm work for the big boys (Apple, Qualcomm, etc).
An ASIC for mining bitcoin it's a "simple" project, only an Algorithm implemented more and more times...