X-bit Labs claims TSMC has increased 28nm wafer prices due to heavy demand:
Although Taiwan Semiconductor Manufacturing Company (TSMC) officially remains conservative about its revenue generated by its 28nm node claiming that its customers are delaying products made using the most advance process technologies, unofficial reports suggest that the company loads of clients for 28nm chips and has increased pricing.
Officially, TSMC expects its 28nm node to account for 1% of its wafer revenue in the fourth quarter of this year because of uncertainties with economics globally. 1% of TSMC's wafer revenue in one quarter at present is about $35 - $40 million, which means that the company aims to supply approximately from 7 to 10 thousand wafers processed at 28nm node this calendar year. But it looks like the demand is higher than that.