When I joined my local, I was a pledge until I was initiated.
When we went AEPhi, I was a new member until I was initiated.
For AEPhi, most things that would imply that new members are "inferior" to sisters are discouraged. There are certain privileges (like wearing letters and participating in membership selection and ritual) that are not extended to new members. Aside from that, terms like "big sister" and "little sister" or "baby _____" are discouraged, and new members are considered "almost but not quite" on a par with initiated sisters.
Besides, I might have belted anyone who called me a baby giraffe...
ETA: "Thetartots" had me LMAO. I might have belted anyone who called me that, too, had I joined Theta.