There are MD programs out there that require students to complete a research project during MS1/2, UWSOM for one. I doubt that is the case for any DO schools, and I doubt any of them have substantial research departments although they may have isolated respected and accomplished investigators. Touro-CA has more research focus than any of the other DO schools I saw, but I would still qualify the overall effort as minimal for a health sciences school. However, that doesn't mean if you are research-oriented you need to work with Touro. I spent the summer in a lab at UCSF, which wouldn't have been possible without the research experience I had prior to med school. I know of other Touro students who got fellowships to do clinical research elsewhere at public MD school-affiliated hospitals as well.
The things I think you want out of research as a med student are:
1. Good things for your CV - this follows you through school to residency and beyond, and any research experience is probably better than none as Zoner said (although I agree with this basic premise, I don't think everyone needs to do research, especially if you dislike it, just focus on building on the narrative of what is important to you in medicine)
2. Contacts - you get to spend hours upon hours upon hours with a PI who is probably an MD or PhD or DO or both or all three. This person will open doors for you, write letters vouching for your character, and challenge you to think... as long as you work hard and enjoy what you're doing.
3. Publications - it isn't that hard to get a poster / abstract done in a halfway decent lab with a year of work, and then voila! You're a published author!! Seriously, I think this is a bigger deal in turning heads on applications, whether to med school or residency, than how many hours you worked at the free clinic (many would disagree with me...)
Lots of people hate research and do it anyway because they feel they should. I disagree with that. But dang if you're gunning for anything -- and lets face it, every step of this process has gotten ridiculously competitive -- I can't imagine going into that battle without some research juice.
