Even a school like Dayton isn't above losing its coach to a bigger program. In today's world at the mid-major level if a coach stays in a place a long time it means he's doing enough to not get fired, but not enough for bigger programs to want him (look at WMU). What he had with Dambrot was the exception, not the rule.
I hope Groce is at a (insert big name program here) in 5 years. That means he won at Akron and did his job.