Dont feel like reading so much at 2:44am, but i can almost guarantee those numbers are wrong, never trust anything saying a single generation difference with over double the performance. Granted that is supposed to be per watt which isn't impossible, but they'd have to shrink the die to like half the current size which isnt gonna happen. And for performance, the number you want is teraflops, standard measure of performance given by AMD and nVidia, never seen gigaflops per watt before. Plus, if the titan were (and i'm pretty sure it is way more) 200w, then 6gf/w would make it 12teraflops, but IIRC the faster gtx690 which is the highest teraflop card out is only 7, so i dont think that number is quite right either.
Idk, i've been up for too lng and need to sleep so don't realy on anything i said, but dont rely on that stuff either IMO