Quoting One Fierce Puppy,
I have less inside info than you do, Raven, but I'll wager that you're being described a difference between overland and combat map flying. A unit that can fly in combat doesn't necessarily get any special flying powers overland, so what it sounded to me like Frogboy was saying was that the armies (the amalgamated forces overland) won't fly (ie have the ridiculous mobility that comes from flying in games like MoM), but individual units might when zoomed in for combat.
Since I know MoM a little and probably most everyone else here does as well, I suspect it would be like the hero with cloud walking in MoM. "walked" on land, but "flew" in combat.
I've got pretty much the same "inside information" as everyone else. It would be nice to say I had a "mole" in the company feeding me info...lol. I don't though.
Indeed I did mean on the strategic map. When I do the DL Mod I'll be using armies of dragons. If this "unit", or "army" is made up of Only Dragons then I would expect them to be able to cross a mountain range. Not necessarily insanely fast like some flying units in MoM, but they would be able to cross over it none-the-less. If that same army suddenly had some land based units mixed in with it, then I would expect they wouldn't be able to cross over the mountain range unless there was a "road" or "pass" or something.
I probably should have been specific that I meant the strategic map. During combat I would expect a "Flying" unit to have some abilities perhaps. Like being immune to a "Earthquake" spell if they were in the air when the spell was cast. Flying attacks, things like that etc etc. Mostly my question was more movement based.
I agree also that flying units shouldn't always be necessarily "fast" meaning it moves farther per turn. Flying high up takes time to gain altitude and keep it, which could be a logical excuse as to why flying units don't move super fast, but they can move over things land based units can not.