I think the reason for digging more trash targets in the enhanced mode is that certain targets, with a particular electronic signature, have been programmed to report a high tone that, in the past for whatever reason, used to report a lower tone, and still do in the Salt mode, and normal mode in other CZ's. Those same targets also report that same lower tone on a regular CZ without the enhanced mode. Unfortunately, there are certain trash targets, especially various sized pieces of aluminum, that have that same electronic signature as those good targets, that also get reported as that same high tone in the enhanced mode, as compared to their lower tone in either the Salt, or normal modes.
That is the reason that it is suggested to turn off the enhanced mode when hunting in locations that are likely to have those trash targets, since they will be reporting a high tone. With the Salt mode, those targets will report the "normal" tone assigned to them. Unfortunately, so will some of those same, older good targets that currently report that same tone as those trash targets because of their identical electronic signature.
Those good targets are there now, reporting those lower tones all along, just as the trash targets are doing. The difference is that with the other CZ's, we tend to ignore those "trash" tones leaving not only those trash targets in the ground, but also leaving those older good targets along with them, because they have that same electronic signature. We don't know that we missed them, because we didn't even know they were there.
For these reasons, I believe Tom Dankowski when he says that the target segment ranges weren't increased. The targets we have been finding with the CZ5 haven't changed. They continue to report where they have all along. It's the certain, older coins that have had their electronic signature added to the high tone, right along with certain, identical electronic signature trash items that has changed.
In newer areas, use the Salt mode and get generally the same performance as a CZ5 does in the Salt mode. Remember, the Salt mode only slightly decreases the sensitivity, and depth, on very small gold items, and small ladies gold bands. Coin sized targets, and larger, will still come in as if you were running a CZ5 in the normal mode. The CZ20 is locked in the Salt mode, and users have always reported the excellent depth they get both in the water, and on the land.
I think you can also use the new, enhanced mode in the newer areas if you are selective in your search, and target recovery procedures. I think a much slower search in those newer trash infested locations is required, along with careful attention to the signal characteristics of the target as well as the depth of the target. I think that you would probably not want to dig high tone targets that were at, or near, the same depth as the local aluminum trash targets are. I would look for targets that give a high tone, and have depth that is greater than the general trash layer at that location. I would probably go over the area in the Salt mode first, recovering the shallower "good" targets in a normal way. Then go over the same area using the above criteria.
I really don't think it is a marketing ploy. I really believe Fisher has hit on something that, unfortunately a lot of users are having a hard time accepting.
This is just my thoughts on the subject after thinking long, and hard about it. It doesn't mean I'm right, and someone else is wrong. What works for me, may not work for anyone else. Again, my hunting, my sites and my soil conditions.
I hope this helps to explain how I feel about it.
Good hunting,
OldeTymer
TheTreasureLeague.com