Yes, I have been in the field of Instructional Technology for 21 years and know personally most of the "big name" professors in the field. It is a pretty tight-knit bunch. When looking at a university doctoral program, remember that individual programs within a university may not be regarded the same. In the field of instructional technology, for example, some of the top programs in the country (e.g. Utah State University, University of South Alabama, San Diego State University) are not necessarily at the "tier 1" institutions.