Liberal "Torah Judaism"
Much as I hate the term.

Is there "da'as Torah"? Are there scholars lay, rabbinic, or talmid-khokhemdik who immerse themselves in the Torah so completely that their system of reference is different from others'?

This is plausible -- with a caveat. These learned Jews aren't to be found just in the ultra-Orthodox streams of Judaism which have popularized the term. Even liberal Jews can have daas Torah. It's just that their -- our! -- Torah is different (cf. "seventy sides/faces/tongues/languages to the Torah").