No it's...still pretty rare.
In BW1/2 you're not running into that many psychic types, and if you are, they're well advertised.
anyway my point is, if you can deal with using something like a Grass type (weak to bug, fire, flying, ice, poison) or a rock type (fighting, steel, grass, WATER, ground) you can deal with using a Poison type.
Especially ones like Weezing or Drapion who can get around one of their weaknesses