To answer the OP question as to whether PCUSA members are considered Calvinists, my answer, for this congregation, is a resounding NO. When we started attending I seriously doubt they had even heard of Calvinism or Calvinists. They hadn't had a pastor for about 15 years; a college professor was giving the Sunday message which were, mostly, Christ centered but he suffered from the same aberrant beliefs as the members and attendees’. Those beliefs were, and still are for the most part, dispensational, premillennial, antinomian, free willism, one person who believes Christ was crucified and buried on Wednesday, and I may have forgotten some. The usual pap picked up from the “so-called” Bible teachers on TV.