The following is Chevy's pattern and you will be able to draw your own conclusion. Captured test fleet vehicles are produced starting a few months before regular production and assigned to Chevy employees for the purpose of day to day real world testing. There are weekly evaluations conducted by the engineering staff. Final assessments are made during scheduled breaks in production, such as the two week model changeover in July or the winter break that occurs at the end of December every year. If no significant problem arises, retail saleable models will begin production shortly after the return to production. I suspect retail orders are being accepted by Chevy even as I write this note.
Several GM vehicles such as the Camaro ZL1 are currently undergoing this process. The last I heard, the ZL1 is scheduled to begin regular production January 9. That does not mean the turbo Sonic w/ auto trans will begin the same date but there is a good chance it will. February is possible but seems a little far down the road if the CTFleet vehicles are being made now.
My suggestion if you want a turbo Sonic w/auto trans is go to your dealer and inquire about ordering one. You can then make the decision as to whether you want to order or not. Two additional colors (grey and blue) are to be added early spring and that might influence your decision.
Laborsmith