Depends how the 2x8 is fastened to the gable studs. I would definitely flag it on inspection, unless an engineer designed it that way. As for being a basic ledger connection, I would disagree since the ledger board is not fastened to rim joist as the IRC shows for deck connections. I am not aware of any prescriptive way to ledger to studs.
The Simpson hangers certainly comply with the 1 1/2" bearing on metal that classicT quoted.
classicT, are you looking at a section for ledgers that I have not seen?