BigDaddyLH, would you like me to tell you where (which text I originally) learned this. I don't have an emotional need to cleanse the tdpri temple, and tell folks that they are wrong. I just don't know where ppl learned that extended chords come from the same major scale.
I can tell you that I've heard many jazz players use the +11 when voicing an 11th chord. I know the 11th is treated differently in jazz harmony.