@Shankovich - Huh? Previous reports were targeting Q2 2014 20nm starting and ramping up in Q3/Q4 2014. Why would Nvidia push back Maxwell (20nm) when their schedule already targets an annual release of next-gen products in the Spring, especially now that TSMC is moving ahead of their previous schedule by a Quarter.
If anything that can almost guarantee Maxwell will be back on schedule at 20nm just in time and if anything I can guarantee you AMD/Nvidia, two of TSMC's biggest clients, are working tightly with them on time lines for each of there products.