hmmm, we should distinguish here between
1. research on osteopathy
2. research at osteopathic institutions
3. research by osteopths
#1 not that there isn't any decent research testing OMM but to date it has been limited. This is pretty pitiful, but AACOM and the profession at large seem to have realized that "because we say so" isn't quite good enough and really are pulling themselves up by their shirt tails. Significant funds and effort are now being pooled and a national research effort being undertaken. Look on
www.aacom.org under 'research' to see more.
#2 varies widely by institution but even the lead osteopathic 'research' schools sorely lag even most non-reseach allopathic schools (see nones post above, with which I agree completely). That's not to say worthwhile research is not done at osteopathic institutions, it is and is increasing at some (see point #1). Many osteopathic institutions, however, this just isn't their focus.
#3 some osteopaths do research at osteopathic institutions however there are many, many more research opportunities, and thus many research osteopaths, at allopathic institutions. Many osteopths do great research in many fields.