Doc I got plenty of family in your area and your right it was bad. The remains of my cousins home was found 2 miles inland from its former location and as crazy as it sounds there were definitely houses where the slabs were gone.
Katrina was bad not only because of the population density but it was such a bigger storm than Rita. Not stronger but larger wind profile and larger storm surge area. However if you were in the path of either one it really doesn't matter the outcome was going to be the same.