It is no secret that TSMC botched the 40nm process. Badly. There is little doubt that this is playing well in favor of GlobalFoundries, Abu Dhabi-AMD powered joint-venture since TSMC's current key customers aren't happy at all.
During Computex, execs from TSMC were trying to convince the partners and the public that they had issues with 40nm bulk process, but that the situation was resolved just prior to Computex and that everything is "fine". Hence the whole thing with the DirectX 11 silicon wafer handout between Rick Bergman of AMD and John Wei of TSMC fame.
However, the situation is still far from being rosy.