KCbob...just a few questions...
1) Are you under the belief that EVERYBODY goes to purgatory regardless of whether they are saved or not?
2) Are you saying that people progress through purgatory at different rates?
3) Can a person that is not saved but has lived a good life "work" their way into heaven through purgatory?
4)Assuming there really is a purgatory, why wouldn't Jesus have spoken specifically about it and/or had a name for it? Does it make sense that heaven and hell are named, referred to frequently and described in detail but that there would be no actual dialogue about "purgatory"? That to me is the biggest reason for not believing that such a place exists.
I'm not entirely positive on the Catholic church's stance on purgatory, but I see purgatory more of a place of purification for those that believe in Jesus, but do not undergo the sacrament of confession and penance. There would also be different rates of "progression" based on things such as last confession, seriousness of sins (I know that's abstract, but I would say breaking a commandment is more "serious" than sins that aren't (such as homosexuality, which isn't explicitly touched upon there)).
For the third question, I would argue that it depends not on believing in Jesus as much as God. As in, Jews and Muslims for the most part beleive in the same God, but not in Jesus as the son of God. I would argue that based on the Old Testament and belief in Purgatory, they'd be in purgatory to purify themselves in a similar way as the Righteous non-believers in Dante's Purgatorio.
Your final question is more of faith/interpretations, and would be hard to convince you otherwise. It's also hard to say that he didn't talk about it, but it was in one of the Gospels that wasn't admitted into the bible. Saying what Jesus did, and did not say is a matter of faith, as none of us were there to hear what he did or did not say.