Catalog wrong?
You are right, the catalog shows the 651/851 at like 25 oz.! Looking at the other guns, that has to be the weight in steel. The ultalight and titanium weights must be around 15 oz. or so.
I think I am not going to wait for the 851 and just go with a Model 85 multi-alloy ultralight Police. It has a concealed hammer, so DAO -- but its less than 14 oz. and +P rated! If the 851 isnt available until December, that probably means February and prices will be high for a while.