Postmodern Influence in the Church - Part 2 - Baptism: Covenantal or Expressively Individual?

It's almost natural to think of a person who is a christian and associate it with a non-denominational baptist. A person who worships at a "lone-ranger" church with contemporary music because the ultimate aim is cultural relevance above everything. A person who values the subjective experience of Jesus above the one revealed in the Bible. A person who gave consent to his salvation and therefore was baptized, but is this the biblical model or is it more of a reflection of the seeds of postmodernism?