A couple of thoughts after reading the responses from my former post...
First, a D.Min. degree ALWAYS ends up being what the student puts into it. The core requirements are the same for a cheesy degree as they are for a stout degree, and both can be had at the same institution, whether accredited or not. Do a smallish project on improving your preaching, with the minimum required resources, a bunch of Internet citations, and 3 good old boys as your peer-review committee and you end up no better than when you started, save for the alphabet behind your name. Do a project where you advance the cause of Sunday school in general for any or all who are interested in bolstering attendance, evangelistic efforts, and ultimate effectiveness of Sunday school in general, and you have written a D.Min. project that makes a difference!
Second, the institution DOES make a difference -- not just the granting institution, but the place where the undergrad and graduate work is done. The majority of D.Min. students that I see coming through SBTS come from other M.Div. programs around the country. Very few are former SBTS grads. The deficiencies I see in their work is astounding, from basic English grammar skills to lack of proficiency handling the Word, some of these men (who are at times "famous" pastors leading large churches) are simply not doctoral level scholars, but if one pays the money, passes the requirements, and gets into the program, somehow they press ahead and make the course. That is often where I come in -- they need someone who can turn their ramblings into a finished product worthy of doctoral-level approval. Someone above mentioned that his undergrad work was more rigorous than his later work. That is (or should be) typical. It is not that master's level work is more difficult -- it just swims deeper into more focused areas. But, that being said, it can be more difficult, if only for the pace required.