Kim, your comment about how we define “in-person attendance” is right on. I know many faculty who do not track attendance at all. And many students decide not to attend in person, but just do the assignments and take the tests to try to pass the class. (Most do pass, it seems.)
As we encounter more administrative challenges to HyFlex due to reporting requirements, I think it’s useful to ask what we are ALSO doing about those requirements for in-person and various forms of online participation. (quality concerns also apply here – how many of us have a rigorous quality review and control system for in-person learning? (none I know of)