> Is there any research out there that shows the benefits of technology being incorporated in the classroom?
Yes.
> Does the opposite exist?
Probably.
> If research does exist, are these studies independently funded or are they funded by the companies of these techonologies?
Both.
I think that educational technology is still at a point of "throw it at the wall and see if it sticks". I also think a lot of technology is being deployed without adequate professional development for teachers.
They have the technology, but haven't been gotten the proper level of training nor had the proper resources to develop effective curriculum using technology.
Thus far, effective programs always seem to have a "rock star" teacher/instructor at the center, going the many extra miles needed to establish gravitas.