The thing is that in your first post you claim:
When 970 is rendering at an unplayble 15fps. The 980 can render at 30fps.
That is a 100% increase in fps!
...absolutely mind boggling considering the difference in available gpu resources for the respective cards, which are no where near double for the GTX 980.
......................GTX 980.........GTX 970
CUDA Cores.......2048............1664
Texture Units......128.............104
However, even considering SLI numbers, your results simply do not back up your assertion. ...it seems NVIDIA isn't bending the laws of physics with the GTX 980 after all...
During a particular graphical demanding scene in metro redux
970: 16~19fps oc 1500
980: 22~24fps oc 1480
980 sli: 44~48fps Oced to 1480mhz, at stock fps is 42~46fps
970 sli: 32~36fps Oced to 1500mhz
During a particular graphical demanding scene in battlefield 4 with resolutational scale tune to 200%
970: 11~15ps oc 1500
980: 16~18fps oc 1480
980 sli: 35~38fps Oced to 1480mhz
970 sli: 25~28fps Oced to 1500mhz
Conclusion:
The message I want to deliver is that the information you are providing is a misrepresentation.