Apparently TSMC has now figured it out and begins production. Still don't think that maxwell will come earlier though. Still wanted to share it, you are free to guess when the new gpus will be released, but it's all just based on nothing
"Its about damn time. Volume production at the 20nm Node for the entire Industry has officially begun over at TSMC. Now don’t get me wrong, TSMC has been working on the 20nm node since early February but that work was almost exclusively prioritized for Apple and the creation of its 20nm SoCs. Now they have finally begun full fledged volume production for the rest of the Industry – and that means Nvidia and AMD too.
Read more: http://wccftech.com/tsmc-begins-20nm-volume-production-gpus-node/#ixzz33hkNTKP3"