I have been playing D&D for 39 years, and as other die-hard PnP players will tell you, these terms have NEVER been used in the context you describe. (See the quote below from ddoplayer.)
In PnP you'll see notations for "Pure Class" in DDO when capstones were released, the term "True" was implemented by the devs. Either way is correct.
Great feedback on the thread.