Pulling all the data can be quite slow and expensive if you don't follow some best practices against the SDK. I've done some work on very large sets of data collection with pretty good collection rates, but it's been customer delivered and isn't really something I can drop without scrubbing past code heavily.
I'm working on a bulk data collection appliance using deltas from the SDK during some of my free cycles, so maybe if you can provide a bit more detail on what you want I can pull some existing work together for an example.