I'm not really sure if you are intending to ask a question or just making general statements. Furthermore, I'm confused as to your logic and the message that you may be trying to convey. Are you saying that only organizations founded in the early 1900s can be considered traditional? Are you saying that even though the Iotas are not traditional by those standards, they are "alright" because they are "part of the greek fam"?
Please clerify.
For general purposes, the founding years for the orgs you mentioned are as follows:
Groove Phi Groove --> 1962
Iota Phi Theta --> 1963
Swing Phi Swing --> 1969
All of the above organizations have been around for 30+ years, so these are not your average "pop-up" orgs. All of these organizations were founded during The Civil Rights Movement, which was a major social movement that greatly changed this country's long-held "traditions" of segregation, racism and sexism.