Argh I'm so fed up with all these scale complaints, a lot of people on this very thread have just chipped in to parrot the obvious - that the scale is messed up. Yeah yeah, big deal. As has already been pointed out, it always has been. As for the "OK scale has always been messed up, but now they're just taking things too far" arguments, well why is ranged archers taking it further than hundreds of years for my ancient era army to reach my neighbour? That seems pretty extreme to me. Besides the fact that in all cases other than the few where they happen to be firing over a city or a lake, an archers two tile range will look fine, so long as you don't consider the context, which is pretty much true of all Civ scale distortions - your Chariots may be taking hundreds of years to reach that neighbour, but local scale is kept, because his units are at least moving at the same pace.
Since I've noticed one unit per tile has been brought up I'll mention another thing which is literally never considered by anyone, which I have brought up a few times. It is that improvements have always been one per tile, and this has exactly the same scale ramifications as 1UPT. If people using the scale argument against 1UPT were consistent they would argue for us to be able to stack improvements (more than just road and other).
Ranged archers will certainly increase fun a lot, and fun > realism, however what is always overlooked is that it will also vastly increase realism in a way unrelated to scale. In real history, archers were very prevalent on the battlefield, especially in the Ancient epoch (and actually less so in the Medieval era), in Civ IV they are basically city defenders, this is extremely unrealistic, and the fact that they will be important on the battlefield increases realism far more than pedantic scale worries reduce it. People may argue that archers can be brought onto the battlefield without giving them the 2 tile range, perhaps by incorporating them into the rock-paper-scissors system. However, the best way to incorporate a ranged soldier that was weak at close combat and usually fired from behind melee troops is to... make it a ranged unit, that is weak at close combat and can fire from behind melee units!
One final note for people demanding this be Grand Strategy and stay away from tactics - the intricacies of battle have at many times in history had huge ramifications on a Grand Strategic scale, so I don't see why Civ has to be stuck with a system which is basically an often tedious comparison of military size to decide the victor of war.