Well, it's official. If you've been holding out for a 6GB GPU at a bit of a discount from the price tag of a Titan, they're coming. While there is no official mention of 6GB 780Ti models, Jacob from EVGA has hinted that there is a possibility of a 6GB 780Ti release around May or June.
On the other hand, today NVIDIA announced a 12GB (assuming 2x6GB) Titan-Z for the low price of just $3,000 -- What a steal.