Any Known Difference Regarding Residency?

I'm wondering if any of you are aware of studies that indicate a difference in how advanced DL degrees (doctorates primarily) are perceived if they come DL schools with no residency (say a Touro or NCU) and those with some residency (say a Walden)?

I would imagine that B&M schools offering DL programs would be in category all by themselves. But I am especially interested in schools whose primary operation is DL.

On another note, I noticed it mentioned somewhere that Walden has a number of graduates who are faculty members at various colleges and universities. Any idea as to whether these individuals earned their degrees before or after their appointments?