You know, we have something in common but it's reversed.
I follow behind people like you with their "New technology" and find all the deep coins that their miracle machines can't reach.
I've done it time and time again.
I can't believe I happened to come across this thread 2 days after coming back from an out of town park that an E-trac user told me that he just cleaned out! Honest!
He said that he found two 50-year old silver dimes and a few pennies that he was able to find with his high-tech, new technology that obviously no one could find before - beyond 8 inches.
I spent the gas money because I love these type of challenges!
Yep, after an afternoon, I had found several old pennies, a bunch of old style nickles, (including a U.S. silver war nickle) 5 silver dimes, 2 silver quarters, and a nice pile of old collectibles. The quarters were 12 to 14 inches deep, and 2 dimes were 8 to 10 inches deep.
The main thing is that most of my goodies came from amongst the thick beds of bottle caps at around the 6 inch mark.
My old technology was able to pluck good non-ferrous out of junk piles where as I know that E-trac can't handle heavy trash.
It would suffer big time from masking.
I have one witness that was with me all day and saw some of my deep finds being retrieved.
Sure, I bet the e-trac can lock on to the odd deep silver coin if the ground is fairly clean but overall it lags in many departments.
Sure, I bet you out did that one guy with his old analog detectors but you have never faced me and my 1266x!
I have specialized in pulling out coins beyond a foot deep and have called at least a dozen different hunters to come over and try one of my deep signals only to hear silence. Then they watch as I dig to China and pull out a coin or goody. I've done this to countless new and expensive detectors.
I'm sure that most reading this post will be in disbelief as you probably are but I don't care! You all can have your new technology!
In fact, I prefer if everyone uses the latest and greatest. That way, there will be lots for me to find!
One final note. The Nautilus could blow your precious e-trac away for depth any day of the week. Yes, the Naughty is new but it uses OLD TECHNOLOGY.
Good old crystal electronics. Can't be beat.
I'm sure I entertained you with this post. Probably just as much as you entertained me with your claims.

I still have my finds from that park in my pouch, all dirty and you're welcome to see them.
Cheers,
Dave.