FPG
Currently, TSMC's 20nm product (that's been confirmed) is Xilinx FPGA samples
If this gives you comfort to claim that TSMC is "in production" at 20nm because Xilinx is offering samples to end users, even though those "production parts" may be unqualified from a reliability standpoint and full of bugs, then we will have to agree to disagree on what constitutes "production". That said, you should not compare Intel's statements of "production" with TSMC's statements of "production" because clearly they do not mean the same thing. To an inexperienced industry outsider such as yourself, the subtlety is lost.