Well, what would you do if you had figured out a way to do this? Explain your idea to everybody and spread the news everywhere? In that case bigger coins, which have much more funding, could implement the technique in a fraction of the time our developers could. And then when we're finally done, everyone would just ask "ok but why are you doing what coin XY already implemented 2 months ago"? It's in our own interest as Spectrecoin investors that the devs will keep this secret until everything is ready to go.
Also, our software is already valuable on its own ... we're not an ICO any more that just wants to collect money. We have a working product and a coin that is valued around $100M USD, and a stealth transaction mechanism that works. Calling it a scam just because of
one single feature that has been announced but not released yet, is a bit hypocritical.

Just wanted to write something like this.
Nobody will tell you in details how that or this feature works because it's business and it's competitive.
Even if they would like to tell you, how do you see this? Give you a bunch of code?
Pretty standard to release a whitepaper before you make a claim so other devs can look over the design. Something so big should have waited until there is an actual release (which would have likely been a quick rise into the top 20 if true), so it's very suspicious that they didn't and are making the claim months before they can let anyone look it over.
They should have waited or released a whitepaper with the anouncement if they didn't want the claim scrutinized--it's as simple as that. TBH.there's nothing in this coin's history to make me take such a claim at face value. Even if GMaxwell had made this claim, I'd want to see documentation and the required math.
TBH, it would be better if they had made some less outrageous claim as it probably would fly under the radar.