Not trying to take away from your accomplishment of the DC 42 with temps up to 47 and Spell Penetration of 29 as that is not effected by what level you go into a quest or what creature you are casting against...
But I think our "futurama" pic poster was pointing out that the CR of the Elite Barbazu Shock Troopers looks like an 18.
I took the picture myself and sharpened it (love graphical art tools) and it looks a lot like an 18 and not the 20/25/30 expected for an Epic Monster. You were making an argument about Sorcerer's being able to CC in Epic, and by "appearance" it looks like you used a non-epic to prove your point.
Again it really does not matter as you have proven you do have the capability to reach the high DC and Spell Pen. However, when trying to prove points it detracts from the message if your evidence seems to indicate something else.
Again I applaud you for your accomplishment of getting the DC and Spell pen that would make you a viable option for CC even in tough Epics.
It's also amazing how during the time when letter writing was the norm (Before Email) written/type word was misinterpreted less often - of course that may have more to do with people having a better insight in who is relaying the message or could it be that with Email and Forums we are losing are ability to convey the intended message?