This is my experience, yes. I suspect many hiring staff look over the job titles and snap onto company/dates employed -- and never see the word "co-op". Thus my idea.
Often I would have conversations with people about resumes where they had problems and those problems would be things like: * How long is your resume...? (way too long, often) * Can you drop/compress any positions? (keep recent/relevant) * Instead of "Employment", can you say "Coop Experience"? for the section? * etc.
(thought questions, not asking for responses). I do agree, you definitely have to make the "coop" part super obvious otherwise you won't make it past initial filters.