3+ years here,
All at the same lab, but under three different directors, on three different projects. Undergrad poster forum and award for that, but no real publications. May be getting a 2nd author this semester, but it doesn't really matter to me. I'm not MSTP, and I know the stuff well enough to prove it to the interviewers.
As for whether research matters or not, it depends on:
A. Who you are, and what your goals are.
B. What med school you're talking about.
For instance, I'm in Michigan. UofM will appreciate some research, while MSU's DO school will probably not care too much, and be more interested in primary care experience.