Definitely feel like this happens, and cuts both ways though - yesterday someone comped our 2 very highly regarded Euro recruits to former zero star recruits Nico Morretti &
Benjamin Bosmans-Verdonk.
And to be a little fair here, Carey Booth was pretty highly thought of coming into Illinois as I recall, and not just people here on this forum. He was on 2nd round 2025 mocks after his initial season with Notre Dame, so 'first round upside' could be a bit of hyperbole but not out of the complete realm of possibilities, imo.
NBADraftRoom #57 for 2025 (7 spots ahead of Andrej Stojakovic)
EDIT: web.archive.org giving me fits trying to look up more mocks, but there's at least one, I suppose