516/3.95, NJ ORM, research-heavy app, sitting on 5 Rs already (Sinai, Case, Pritzker, Stanford, Rochester) but received a WashU interview today

This is my first and only II, and I applied to 30 schools

I know they're notorious for sending out interviews to high-stat applicants in bulk, but does anyone know if later interviews for lower-stat applicants undergo more holistic deliberation?

Just want to ascertain the quality of my app with this invite, i.e., is it compelling enough to receive interviews from other schools later that aren't as research-hungry (like say, Cornell) or is this a "cookiecutter" invite solely based on my name-brand research?