Yes, but not just those.. I'm talking about the extent to which I have to shift my attention from the situation at hand to consulting a rule or mechanic, a part of which is how easy a given rules set is to internalize (and thus consult far less regularly).I assume that you are talking here about the action resolution mecanics.
But not, for instance, the rules about who gets to say what. I don't think that those "fade into the background" any more in (say) Prince Valiant than in (say) Rolemaster.
I'm not 100% that this is what @Lanefan means, but I think I'm at least close.

