I have a 980 Ti and I've had no problems staying at 60 FPS maxed settings at 1440p
Literally every publication that I've read including TB's performance review disagrees with you unless you have some setting turned off. Maybe you're averaging 60fps with drops below that or something but when the vast majority report that they can't keep minimums above 60fps on a Titan at 1080p I'm pretty skeptical of you.
Also does anyone know if the 21:9 ini tweaks are Vert- or Hor+?