thats what we have for CT´s. you can deploy a CT in seconds.
just to note, KVM templates, cloning etc. is since quite a long time in development.
Yes, openvz templates can be deployed in seconds, much faster than deploying a kvm template will be. Well maybe super fast SSD can deploy kvm templates in seconds too.
Looking forward to seeing the new kvm cloning feature, seen all the chatter on pve-devel and like what is planned.