Thanks to the help I got here, my iOS 9 contacts are synced with my GMail account pretty well - the sync works, but is not immediate.
I would like to sync my contacts to iCloud as well, in order to be able to call a contact from FaceTime on my Macbook Pro with El Capitan 10.11.1.
I have enabled contact sync under iCloud on my device:
However, only 44 contacts are synced. There seems to be nothing special about them - some are old, some are new, and they were all synced from GMail.
Any idea how to sync these contacts to iCloud?