I just ran AnTuTu for the heck of it and I got a 33713 which is up there but behind the M8(35244), S5(35046) and Note 3(34265)
If you run the test, you can't look at just the final number... look at the detail and compare the breakdown and in AnTuTu case for my test, I see when compared to the M8, or S5, and Note 3, the G3 actually scores better in the majority of tests. What was really kept the G3 in beating all was in the same test... the Runtime and the numbers were really lop sided compared to all the other tests... 1811 vs 3446 against the M8, 1811 vs 3550 against the S5 and 1811 vs 3613 against the Note 3.
Not sure what's involved in the Runtime test and why the G3 lags behind. I run the test for fun and ok with the numbers.