There is nothing new here. Entomologists working on insect resistance management issues have long known about developmental asynchrony and have considered it in proposing defenses against resistance. Asynchrony is in every entomology textbook. I have no problem with the research being done, but it's a little surprising it is being released at this time and with the implication that it has uncovered something new and significant in regards to resistance management. I also take exception to the statement that these laboratory findings contradict an important assumption of the refuge strategy.
Nothing is contradicted until it is proven in the field.
A laboratory experiment, where populations are artificially controlled does not replicate a field environment. In the field, all insects do not emerge at the same time and they don't all develop at the same rate. There is considerable overlap in generations. Therefore, there will be populations of susceptible insects to mate with any resistant insects. I think this study has very little relevance to current strategies for insect resistance management.