Same remarks as Matthias, not sure to understand how it works (even if I think I've understand ...)
General remarks about Paging:
Even if it's not in scope for 1.0, I think we have to keep in mind that we will also be able to do pagination "offline" / "only client side" (maybe we would do some paging on a Store element ?) , so we have to consider this when designing our API.
Seb