Bit-techs review makes it out to be barely faster than a GTX760.
Not checked any others but .... oh dear. It does use less power but realistically a 760 wasn't a massive power hog in the first place.
The pricing seems the wrong side of £150. The cards costing over £180 are LOL worthy.
Looked at Techpowerup, and they peg it as about 10% faster than a GTX 760, but it costs about the same money.
Not worthy of a generational increase IMO.
This GTX 960 should be a GTX 950Ti (successor to the GTX 750Ti) arguably.