`to_dask()` not lazy when `simplecache::` in urlpath

when loading `to_dask` with caching as in https://github.com/pangeo-data/pangeo-datastore/issues/113, `fsspec.open_local` first loads the whole dataset and then opens the data in `xarray`, still with chunks but after having spend the time on downloading.

is there a way to circumvent this in `intake-xarray` or is this a consequence from `fsspec` caching that cannot be changed for `intake-xarray`?

it would be great to just do `to_dask()` without spending the time to download and only cache when `xarray` runs `compute`.