You cannot say a bonus without a type mentioned on it is 'up in the air.' A bonus without a named type is, by definition, an untyped bonus. It's the RAW, and RAI.
As well, it is RAI that if you have, for example, a race that gives you a bonus to diplomacy, that the half-elf could not help them out?
You have -precedent- in the books of what an untyped bonus is, and the bonuses to skills from race follow that precedent. No named bonus = untyped bonus.
It is a logical fallacy to believe that the rule suddenly changes -without any mention- when you're discussing it in the context of race.
It's a house rule that races give racial bonuses to skills -despite all evidence to the contrary-.
All evidence points to non-typed bonuses. They've had a year to resolve this, if they'd intended those bonuses to be racial, they'd probably have fixed it in a rules update, and probably would have templated the new PHB2 races to use the 'racial bonus' terminology. They haven't, so all evidence points to things are to be taken exactly as written in this context.