I prefer the non-PC terms only because it seems to be more appropriate in my opinion. As mentioned before recruitment is a giant rush process, everything is based on a brief time spent with these people, unelss you knew them prior to recruitment.
As far as the pledge/new member thing goes...I try to call them new members, but usually refer to the classes as pledge classes. I considered myself to be a pledge. On my bid day, a psychologist at our school spoke about Greek Life and raised a very strong arguement concerning the use of the word pledge. What do we ask these "new members" to do? They take a pledge. They
pledge their loyalty and devotion to the organization. And yet somehow, it's a demeaning word.
When I post about stuff though, I try to be PC...my way of attempting to break out of using the old terms for it.