Why does everyone keep saying that in a straight up fight fighters > ints? Early interceptors have slightly BETTER stats than early fighters and are much cheaper. Unless there's a hidden modifier (which I doubt) there's no way that fighters can dominate ints as much as people here are claiming. I still build fighters mainly unless I'm Germany or the USSR because the extra range is worth the 2-3 IC difference unless you choose to exploit the system by keeping airbases in queue, in which case range doesn't matter.
In HOI2 Fighters were better than equal year INTs, that was changed in DD, INTs Air attack values were increased. Maybe people are still thinking along those lines.
Air units statistics HOI2
Air unit statistics Doomsday 1.2 -- PDF warning --