I think you will be right Iceberg. I have been comparing the satellite pictures from the last few hours and it looks to have intensified quite significantly. It has strong banding and a beautiful tight eye, quite similar structure to that of Katrina. I attach a copy of the satellite image i saved from Katrina just as NHC reported a Cat5 175mph monster. Could Dean go that far? Don't rule it out..
What sucks for Jamaica is that Dean will be approaching its shores at sunrise right after its had all night to cool the cloud tops and intensify once more. As already pointed out, only ERC can save it.