IMO a 1,000lb loaded tongue weight (or heavier) is very possible on the 28DSBH, depends on one loading habits.
A 28DSBH "loaded" at 6,500lbs with a recommended 13% to 15% loaded tongue weight range = 845lbs to 975lbs. Two JOF members noted that their 2014 model 28DSBH's had a shipped from factory UVW of 5,943lbs & 6,001lbs respectively, I added just 500lbs for cargo.
The 28DSBH has a 7,500lb GVWR, so there is still room for an increase in tongue weight from my 6,500lb loaded TT example above.
Just a side note, many folks experience enhanced TV handling of the longer and heavier TT's towing at a 15% loaded tongue weight.
On Edit: JOF member 'Drysok' posted that his 2015 model 28DSBH had a shipped from factory UVW of 6,071lbs...., so 6,000lb UVW seems to be the weight to start with.
2016 GM 2500HD 6.0L/4.10
2005 Jayco Eagle 278FBS
Reese HP Dual Cam
Putnam Class V