This is actually one of the most useful blog things I've seen. It's a solid reminder that teaching an online course is not a checkout for the teacher. Students really want constant feedback - because many things are not verbally explained and the students have to break them down into steps for themselves, it can be overwhelming. They want to know "Am I doing this right? Is this what you're looking for?" so constant feedback and grading reinforcement in more necessary online than in f2f.