Oh definitely not (actually in retrospect I probably should have asked for permission before posting anything at all...). I mean, I could talk about what they sounded like, but I'd probably get even more flack when the final version doesn't sound like what I heard, so I only wanted to share what I was sure about.
Wouldn't you mention it regardless then?
I imagine you'd be disappointed too if the final product sounds worse than what you remember the prototypes sounded like...
And since you did actually own the HE-500, yet you say these sounded unlike anything you've heard before... That's some vindication already.