you can see the game as a demo but it is a common thing for developers to let people get hands on with the product well before launch to balance multiplayer. It's an unfortunate thing for them, and fortunate thing for us that this translates into getting access well before release. If there was some way they could avoid this you can bet your ass they would.
In stark contrast is a demo that is meant to either hype up a game weeks before its release or give you a taste of the game so you go to the store and buy it right away. Limited units, a few campaign missions, that type of thing.
When you get full multiplayer access of the entirety of the multiplayer experience except for custom maps, big team gameplay (prolly added later), you can't call that a "demonstration", its more like a huge chunk of the full product, the part they want us to test, early.
If you go do quality assurance, either free (like sc2 beta) or paid (as a job), for a developer pre-release, do you call that a demo or beta/game-testing?
I at least find this the case for starcraft 2. Now when you take the specifics of a "beta" such as COD4, well I can see why you'd call that a multiplayer demo since you are cut off at a certain point, like couldn't get past level 10 or 15, no martyrdom is what i specifically remember.
who should terran use for good ground defense from anti-air? i know the transformer thingy is pretty effective in air to air combat, but what else is there? seems like everyone's anti-air got super nerfed in SC2.
