Supposedly in the region of 35-40% faster than the 7970. Unless anything changes dramatically I can't see it being a challenger to titan.
Not likely.
Its different design goals.
I dont expect much maybe a 20% or so increase maybe a tad more but also a overall tweaked design allows a little bit more but same node I dont expect more.
I take it though, 20+ and single card and watercooled, allows a bit more fps at my set up so I go for it.
Titan, nah way to expensive.