Asset Bundle - Load Uncompressed Async

We are using asset bundles in a standalone game to stream terrain off disk. I'd like to use uncompressed asset bundles to avoid the load/memory overhead, however there is no async version of CreateFromFile. My plan would be to load assetbundles, asynchronously using the WWW class, WITHOUT using the LoadFromCacheOrDownload method. We already have our own caching system for resources. So if I use WWW to load uncompressed asset bundles will I still have the same load/memory benefits as using CreateFromFile?

 

I am interested in this as well. Any plans for a CreateFromFileAsync?