It isn't true because Intel's chips are BETTER for most work, especially gaming. It is more like Intel being a small, fast car with AMD being a huge, slow truck. Sure, for profession business and people whom use the many threads/pulling power of the larger chip/vehicle, it's better, but most people don't need it and would prefer the faster, more efficient vehicle.
Then you have Intel actually beating AMD in every way once you go to quad core Sandy Bridge i7s and beyond. So no, Intel is not like some crap American car. Besides that, the FX-4170 might not be able to be overclocked too much further. It might be a higher binned chip, but even then I doubt it would be too different from an overclocked 4100 and would thus only match an i3 even once overclocked.
Besides that, the i3 would use around half of the electricity being used by the FX chip and that would negate ANY price difference over a year or two unless this FX-4170 is cheaper than the 4100, which it won't be. Once again, the FX will only beat the i3 in highly multi-threaded work and this time in some FP work such as encryption because i3s don't have proper encryption acceleration support.