Sonicadvance1 said he was getting 27fps on his s4 which uses snapdragon 600. People with the one claim about 20fps on HTC one and HTC one s overclocked say they can get 15+ fps. Personally my nexus 4 gets less than one. Anyway the point is the snapdragon 600 can get that so the 800 should be awesome and the tegra 4 beats that (in benchmarks :/) so I would hope shield can run it well.
I know this was your first post and you're new, but please read. The reason the Snapdragon series is significant is the support for Open GL ES 3.0. Its not about benchmarks. Also, those FPS reports are for a test application that renders multicolored stars in a black 3D world. You can't even move around. Those numbers are completely arbitrary as they don't actually show performance of a game.