Cinder no longer shows used quotas, the response novaobserver gets with python-cinderclient only has the allocated quotas:
{'eqiad1-r': {'rate': [], 'absolute': {'maxTotalVolumes': 8, 'maxTotalSnapshots': 4, 'maxTotalVolumeGigabytes': 80, 'maxTotalBackups': 0, 'maxTotalBackupGigabytes': 1000}}}
It worked when I originally configured openstack-browser to display that, I believe we were running openstack train back then.