Geforce Titan - GK110 will be a consumer part

[boxleitnerb]

You do realize that they have at least some fully functional 16SMX units at HQ don't ya ?
It is a matter of yields, profitability, opportunity, risk & interest and finally a timing thing.

When is Maxwell going to hit the shelves in your opinion ?

GK110 has 15 SMX. A 16 SMX GPU would be a completely new design. Highly unlikely that we'll see that with Kepler since it really isn't necessary and would just cost money to design, tape out etc.
There are rumors that initial Maxwell parts will be 28nm too. Either they skip the traditional refresh and release Maxwell@28nm in Q4 2013/Q1 2014 or they release the Kepler refresh and release Maxwell@20nm somewhere in H2 2014.

maxwell was tape-outed few months ago, but NV is waiting for 20nm production

Source? Which Maxwell GPU?