In what, non-traditional magic, maneuvers, footwork...exactly what is this training in?
In addition to the class traits listed in the PHB, exceptional martial prowess.
I'll get to this.
Yet in the end, it is the effect-based design (regardles of what led to effect-based design) that causes the problem.
Sure.
So it doesn't take training to wield a weapon effectively?
Of course it does. That's why 4e has weapon proficiency bonuses. If you've trained in that weapon, you wield it more effectivly. The
Basic Meelee Attack power allows anyone to pick-up something 4e defines as a weapon and use it. But it's almost always more effective to use something you have more training in. A fighter, for example, probably has trained with the weapon he or she is using but has trained to use that weapon in more effective maneuvers, like cleave.
Again, what type of training are we speaking of here? I guess it also doesn't take training for the different monsters and NPC's in the MM to pull off their powers... because they don't have power sources either.
NPC and monsters don't need power sources. Power source is really just a PC Class concept, so if you wanted all PC Classes to use it, not specifying the power source is a good idea.
IMO the more you examine this the more it seems pretty flimsy reasoning.
You used the lack of a power source with the Basic Melee Attack and Basic Ranged Attack as evidence that the martial power source is magic. The problem with that contention is that those powers are just there so characters can wield a weapon and attempt to hit something with it either with an opportunity attack (have I said I hate that phrasing yet?) or when you can't use some other power.
Hey I respect your opinion, though I don't believe you've argued the narrative control (a sidebar story, without a power and perhaps not even playing D&D 4e) as support for that style of play in anything close to a convincing manner... especially since while it may not be contradicted by the rules (in the same manner using foam weapons for combat isn't) this isn't the same as supporting something.
Sure it supports it. Think about it, Mallus said that narrative control consistent with the rules. You said that had no basis in the rulebooks. Those were strong words. I pointed out a basis. Sure, it's not much but it's a positive statement by a designer in a core rulebook.
As far as alternate magic... It says it in the description it's not traditional magic...and that they allow people to do things ordinary beings can't...yet martial powers apparently work different from what we consider any other ability that would be classified as martial such as the basic attack, or a Human Bandit's Dazing Strike... or how about an Ogre Warhulk's Flail Hurricane. None of these are classified under the Martial power source. Though I would think an ability like Dazing Strike would take some training to do since I believe it's an encounter or recharge power.
The problem with the wording you're quoting is that it's a negative statement. You're inferring what the martial power source is (and what the game designers intent was) from a description of what it isn't. I provided an alternative explanation, flowery prose.
Now, what's the simplest explanation: that the designers consistently failed to explicitly name magic as the source of a fighter's, rogue's, and ranger's power or that they didn't say it because they didn't intend it?
Edit: the first page of Martial Power says "All legendary warriors develop martial power to such an extent that their abilities are the equal of
magical abilities." Not traditional magic, just magic. Again, what explanation is simplest: the one that requires the designers to leave off an important description, or the one that takes it at face value.
So now my question is what seperates someone whose using a power that is based in martial abilities as opposed to someone who uses the martial power source?
The ability to do something extraordinary.