It should be even more

I only tested 3d mark so far and it is even more - graphics wise that is -
http://www.3dmark.com/compare/fs/2816753/fs/2809573
Very cool! I also still have a 2500k. I'll be doing some before and after benchmarks once I get my hands on my 970 (in about a week and a half). I'll be coming from a 660ti so it should be an even bigger gain.
Glad to see that 2500k holding its own.
I'm on my 2600k (4,4 GHz) and I'm going to upgrade from 560ti 2gb to a 970. This is going to be awesome!
Time to post some more detailed data, fellas!
S.T.A.L.K.E.R. Call of Pripyat Benchmark [DX11, 1920x1080, Maxed, AAx2]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] =
Day: 101
Night: 104
Rain: 110
SunShafts:72
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] =
Day: 142
Night: 142
Rain: 155
SunShafts:104
Stone Giant [1920X1080, High, No Window Mode]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 126
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 187
Aliens vs Predator DX11 Benchmark [1920x1080, default]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 101,6
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 158,6
Colin Mc Rae: DiRT 2 Demo Benchmark [1920x1080, Maxed, 8xMSAA, no V-Sync]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 108
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 147,5
Just Cause 2 in-game Benchmark [1920x1080, Maxed, no V-Sync, AAx4, AFx16]
The Dark Tower
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 67,85
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 104,85
Desert Sunshine
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 78,14
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 120,34
Concrete Jungle
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 60,56
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 89,17
Lost Planet 2 Benchmark [1920x1080, DX11,, V-Sync off, AA CSAA16xQ, Motion Blur On, Maxed, DX11 Maxed]
Test A
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 86
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 134,8
Test B
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 67,9
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 91,3
PLA Benchmark [DX11, 1920x1080, Texture High, Dynamic Shadows On, PhysX High, V-Sync Off, Antiasing 4xMSAA, Post Processing On]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 95,09
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 117.8
Unigine Heaven 4.0 [DX11, 1920x1080, Quality Ultra, Tessellation Extreme, Anisotropy x16, Stereo 3D Off, Multimonitor Off, Antiasing x8, Full Screen]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 33,7
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 54,1
Unigine Valley [DX11, Ultra, AAx8, Full Screen]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 42
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 57,2
Hitman: Absolution in-game Benchmark [1920x1080, Ultra, MSAAx8, no V-Sync]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = Min: 27,18 Max: 42,8 Average FPS: 33,16
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = Min: 37,7 Max: 56,42 Average FPS: 48,29
3D Mark
Ice Storm [Preset Extreme, not include demo]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 148596
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 159336
Fire Strike [Preset Extreme, not include demo]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 2979
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 4762
Sleeping Dogs in-game Benchmark [Maxed, no V-Sync, FPS Limiter off]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = Average: 46,3 Maximum:64 Minimum: 28,6
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = Average: 70,9 Maximum: 110,5 Minimum: 41,4
Metro: Last Light in-game Benchmark [DirectX11, 1920x1080, Very High, AF 16X, Motion Blur Normal, No SSAA, Tessellation Very High, Advanced PhysX On]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = Average: 40.67, Max.: 93.76, Min.: 7.33
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = Average: 68, Max.: 134,37 Min.: 9,07
Final Fantasy XIV Benchmark [Graphics Presets Maximum, 1080, Full Screen]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = 7871 - Performance Extremely High
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = 9282 - Performance Extremely High
Unreal Engine 4 Elemental [SDK version, bench via FRAPS]
i5 2500K 4.4 GHz + GTX 670 [ForceWare 3337.50] = Min 21, Max 56, Avrg 39
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = Min 34, Max 58, Avrg 51,673
Lord of the Rings: Shadow of Mordor in-game Benchmark
i5 2500K 4.4 GHz + GTX 970 [ForceWare 344.11] = Ups, can't talk about this yet ;D