have you been to Oaxaca Supertacos? is the food anymore Oaxacan than Apizza Scholls or Laurelhurst Market or Toro Bravo? Have you been to Oaxaca to be able to compare the real deal with Oaxaca Supertacos in Portland where, I'll wager, burritos, full of rice and beans and gawd knows what, are their biggest selling items???? You will NOT find burritos in any place in Oaxaca, unless there is a place catering to silly gringos who think reviewing a Mexican restaurant (outside the state of Sonora where, admittedly, there are burritos) is the best way to judge Mexican food in Portland.
Do you have experience at Oaxaca Supertacos? If so, then your "less wiseassy" comment is valid.
I've been to Taqueria Oaxaca, eaten their "mole negro". I've been to Toro Bravo and Laurelhurst Market. And Apizza Scholls. Number one and three in this latter list are as good in their league as Taqueria Oaxaca is in theirs.
Tell us more about Oaxaca Supertacos and how they qualify as "Oaxaca Style" Mexican food. Please! I'll go tomorrow if it really is Oaxacan.
I'm afraid you are out of luck. I don't think any of the only 5 restaurants in PDX mentioned in this forum serve comida oaxaqueña (let's see, toro bravo, apizza scholls, tanuki, ten-01, laurelhurst market, kenny and zukes....nada, nada, nada, nada, nada....), so this board isn't a good place to look!!!
That said, there is a little place off Killingsworth, around 45th or so called Taqueria Oaxaca (across from Ole Frijole) which sometimes has what they call "mole negro de oaxaca" or something along those lines. It is nothing special. Everything else on their menu is standard Portland taqueria fare, i.e., blah. There could be some other place that has some Oaxacan stuff tucked away (as La Estacion and Angel Food and Fun feature Yucatecan chow), but not sure where and what. Unfortunately, this board in regards to PDX is not very well trafficked and so the odd little joints don't get much attention here...too bad, there are probably some great gems lurking around. But we do get mentions of the 5 aforementioned places 2-3 times per week.
Try Seattle, I think there are at least two Oaxacan places there.