I think what was said that, due to the topography of the area, size and intensity of the storm, a Cat. 4 is just as bad as a Cat. 5, if my memory's correct.
New GFDL still slamming New Orleans:
http://www.meteo.psu.edu/~gadomski/GFDL_0z/f42.gif
I betcha that is what he said. I never caught his name, did you?