According to JetBlueBestFareFinder here are the unreserved seats:
To Orlando 13-10-10=33
To Fort Lauderdale 12-13-16=41
Based on 600 available seats this equates to a load of 87.66% Again do not forget about 20% Dunkin Donut discount on JetBlue Tickets. Read this post for details.
Bottom line we are always seem to be in the mid-80’s, which seems pretty good to me considering July-August are the off peak months.