No this is really not true. The ITF did original TKD from the OhDokwan, which was the military gym. Now some did study in the other kwans, but their indoctrination into TKD occurred in the OhDokwan in the 1950s. The WTF tournament rules came from the JiDokwan in the 1960s. members of all the kwans did eventually join the WTF & KKW. The kwans were forced to retire in 1978.