I'll be curious to see the official reports or hear from BSiO2. Looked like there was a lot of sand pushed up and added from what I saw. Even some of the walkover steps looked like they had sand over a few more steps than before the storm. Perhaps they were built back further than some steps that people have reported sand missing.
Since you asked..;-)
That Brad Pickel guy quoted in the paper hit most of what I would say, but generally speaking it was a mixed bag this time. There was definitely some beach profile lowering in Seagrove where the peat was uncovered, but there was also some toe of the dune building in other areas (look on the Destin Log website at Whale's Tail- they got sand).
In western Walton County, most of the beach fared very well, but areas where the beach was narrow to begin with had dune impacts. Along 30-A in areas that were already narrow before the storm (Blue Mountain, Old Seagrove, Dune Allen), we saw some dune scarping but nothing like we have seen with some of the hurricanes. I guess there's not a cut and dried answer this time except to say that the more distance there is from the water to the dune, the less the impact.
I personally believe that the majoity of the sand that was eroded from the beaches and dunes is not "lost" this time, but is in the nearshore areas and will have a VERY good opportunity to be pushed back on shore with the winter and spring waves. I think you could see some wide flat beaches in December and January that are perfect for a stroll so make sure and enjoy them.