Culturally though, The Pittsburgh area (as resident of 10+ years) is caught between the East / Midwest, but the rural areas North and West feel solidly in the Midwest culture to me. Very different from all parts East.
That's fair. And rural Indiana or Ohio feels similar to rural Iowa. So... there's geography, and there's culture. Geographically, the term feels wrong to me for someplace that far east, but culturally, maybe it still fits.