Sharing an approach and "whacky theories" isn't better than simply showing your work. If it's truly as good as you describe, it will stand on its own feet.

Unless it's something your client doesn't wish to share I don't see why you're secretive about your work. Looking at your post it seems you're very proud of your creations.

And while using grid frameworks is restrictive it's absolutely not like leaving the scaffolding on permanently. If you do that it's immediately visible by any passer-byes. Layperson visitors will have zero idea that a particular grid framework was used even if they viewed a source code.