One other point I will add -- testers (during prototype stage) are not there FOR US. They are not there to "prove" to "customers" that the machine works. They are there to tell the manufacturer of all the glitches/improvements that might be needed to a prototype machine.
AFTER RELEASE, of the production model of the unit, then DETECTORISTS will buy, and "test," the machines. THESE are the tests most of us are anxious to see. We are all waiting for trusted USERS of the new units to compare the performance of the machine, in hopefully well-constructed test scenarios to other, known machines for comparison purposes. I think what is getting confused here is the difference between a "field-tester" of a prototype machine, who is hired by the manufacturer for the specific purposes of helping to work the kinks/issues out of prototype versions of a unit, and a USER/PURCHASER of a machine, who seeks to test the performance of a new unit and share that information with other detectorists so that they can make informed purchase decisions.
Here's what I think...
I think Minelab has a machine that they are very happy with, and that they believe offers a new breakthrough in technology of some sort, that they really feel that detectorists will find valuable and will help them put more finds in the pouch. AND -- they realize that several new machines are coming to market now, or soon -- and SO, they put on this sort of "over the top" show at Detectival, hoping to achieve exactly what they have in fact achieved -- which is to generate "buzz" and "conversation" and "excitement" amongst detectorists, by informing us that they ALSO have a new machine that is coming, one that we might want to "wait a bit" on, before pulling the trigger on some other unit. And from that perspective, they HAD to let us know a LITTLE BIT about the machine, so that we could see what its potential MIGHT BE, compared to an AT Mas or any other soon-to-be-released machine. BUT, they can't show TOO MUCH, yet, as the machine is NOT in final form. They are counting on their reputation as a company, in the eyes of detectorists, trusting that they have built up enough credibility based on performance of their past detector releases, that we are willing to give them "the benefit of the doubt" for now, and give their new machine a chance once it's released. And from that perspective, it would be COLOSSALY DESTRUCTIVE to their company, and reputation, to do all of this, mention "new technology" that may "obsolete other technology," and yet actually release a piece of junk. I have faith that they won't do THAT. The machine will probably not exceed the performance of the CTX, or E-Trac, or possibly even the Deus, BUT, I trust it will be a very good machine that is very capable. As for the PROOF of that, I think patience is required until the machine is COMPLETED, and we have machines in the hands of trusted DETECTORISTS who will, hopefully, put them through proper "testing."
Steve