I can’t speak to attitudes about LACs in the midwest but I can speak to the western US. Out here, the LAC is a relatively unknown creature in my experience. At least in my view, the top ones, or most well known to the LAC crowd based mostly on selectivity and reputation are, north to south, Whitman, Reed, the Claremonts and Occidental. If you go east a bit more you pick up Colorado College. There are several others that are fine institutions, many of which I know pretty well having had family and friends attend (e.g., Puget Sound). When I was a kid, Puget Sound had a stellar local reputation but over the years that has (again just in my view) slipped a bit. The rise of the University of Washington’s national reputation along with the sharp increase in its selectivity seems to have overshadowed many other schools in the PNW. It may have something to do with that. I’m not sure.
I myself do not include small or small’ish privates like the Jesuits in the LAC category because I think they are different kinds of institutions. Caveat: I don’t know Soka, I don’t know Mills (especially now that it’s part of Northeastern) and I don’t know much about the schools in the inland western US other than Colorado College. I know plenty of really bright people from schools like, for example, Rocky Mountain College (one guy from there who is crazy smart), Carroll College, College of Idaho and Evergreen State but I don’t think of those schools as in the same tier as those I listed.
One thing I’ve noticed in my neck of the woods is that familiarity with LACs, particularly knowing things like Whitman students being academically equivalent to kids at UW or that Middlebury College isn’t a made-up school name from a TV show, has to do with sophistication. The closer you get to Seattle (or Bellevue on the east side of the lake), the less explaining you have to do about why your kid is going to Amherst. You get a skip of distance in any direction from those places and you’re going to get blank stares until you find yourself in Portland.

