Does Tabitha Smiths's sp cause penetrating damage?

Timebomb: Give Tabitha Smith a power action and place up to two hindering terrain markers in non-adjacent squares, that aren't blocking terrain, within range and line of fire. At the beginning of your next turn, remove them from the game and deal 2 damage to each character occupying one of those squares and 1 damage to each other character adjacent to one or more of those squares.

Nowhere does the word "penetrating" appear in that power description.

If you are playing Golden Age, you can apply the feat "Armor Piercing" to her for a small cost. Then you are guaranteed to do one damage minimum.

Otherwise no, its a regular attack and anyone with Invulnerable or Impervious laughs at her!