v2/vms query parameters?

The docs for GET v2/vms state the following:
Virtual Machine disk information and network information are not included by default as fetching these are expensive operations. These can be included by setting the include_vmdisk_config and include_vmnic_config flags respectively.

Based on this I was planning on leveraging these flags for performance reasons when listing VM's, but I'm not sure they are working. I'm testing against a Acropolis system running 5.0.0.2.

I diffed the JSON responses from Swagger when include_vmdisk_config and include_vmnic_config were:

1. both excluded
2. both set to true
3. both set to false

The JSON is identical for 1 and 3, which I expected, but for every VM the vm_disk_info and vm_nics fields are populated for each VM. When I diffed 1 and 2 the only difference is that each disk reports its size.

Is this expected?