Thats the current hope, but I have my doubts now. Unless a first level minion has less than a 1/3rd of this sample skirmisher's HP, very few things are to even have a chance to die when struck. A greatsword hit or a rogue's sneak attack should stand a good chance of putting a mook out of the players misery. Otherwise IMHO 4e combats going to feel like both sides are swinging foam weapons.
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As far as being outnumbered by these skirmishers goes, it will get deadly fast.