I've heard that before.
That has to do with the type of reverb it is--feedback delay network. It puts it in the same ballpark as those early Alesis reverbs, of which I actually still have three (rack units). I can't say I'm terribly inspired to use them, and I'm fairly disinterested in interfacing studio line level gear in and out of modular stuff, so they sit, until I finally sell them, with the gazillion other things I need to clear out of my life.
But anyway, it's a cool sound. Not a "real" sound, but a cool sound.
I'm excited about the ADM23 as its sound seems to get closer to 'real spaces,' and thus, lends itself well to a master reverb in Eurorack, and without being too big.
I have an Erbe-Verb, and I like it a lot. I don't think it works that well as a master reverb, and finds its best uses as an instrument in itself. With aggressive modulation of certain parameters, and treated in a rhythmic, even gated fashion, it can yield incredible results. But as a general master bus reverb I find it limited.
It, combined with AD's Spectre, creates some especially cool stuff. I'm all about frozen reverb effects, which are then revivified, sampled, sequenced, modulated, etc. I used to do a lot of that the old fashioned way, years ago, with a bunch of studio hardware. Lexicon had (has?) some outstanding algorithms for that stuff.