Hotel's official name: Hilton Wilmington Christiana
State/province/country: Delaware (USA)
Your status (Gold/Diamond) at time of stay: Gold
Type of breakfast offered (full/intermediate/continental; see wiki): Intermediate
Taken in restaurant or lounge?: Lounge
Extra options (e.g., upcharge for full breakfast):
Added your report to wiki?: Yes

While I wasn't told this officially, the breakfast host said that breakfast tomorrow (Thursday) would be in the lounge but breakfast on Friday would be in the restaurant. I take this to mean lounge breakfast is Mon-Thurs and restaurant breakfast is Friday-Sunday. Note the restaurant is a full breakfast (including made to order omelettes), while the lounge is intermediate (they had individual french toast casseroles and vegetable quiches, while the host made scrambled or poached eggs to order).