Incorporated developers indicate possibly faster development, but will not effect exposure time. Brighteners just make the base brighter than plain paper would be. I would not be surprised if it is pretty slow paper, but neither of the statements that you refer to would relate to that.
As far as I know, Fiber papers do not usually have developer incorporated in them, in fact with Kodak leaving the market, I think developer incorporated papers have become extremely scarce.
You might see if they have a smaller package of the paper available to test it first. It does sound promising, but I am not interested unless I can be pretty sure it works okay with OC safelights, and J&C seems to be saying it might not.