i had a friend who was top tier hyatt. he was gold or diamond hhonors the year b4 and wanted to rebuild his status. i told him to ask hhonors if they will comp him based on his status at hyatt.
bottomline: hhonors will NOT comp anyone to diamond. however, they offered my friend a fast track to diamond deal (Xstays or Ynights in 90days IIRC)which basically still works out to the same number of nights/stays on a per annum basis. this happened earlier this year i believe.