Has Internet2 provided a network for Research and Education for 15 years, continuing to grow capacity with the needs of its community? yes. Has Internet2 built a set of middleware and tools that it has open-sourced for this same community to enhance the state of research and education network operations? yes. Has Internet2 pushed the boundaries of what router vendors support, Having IPv6 when it was still considered an 'advanced service' by most network device providers, multicast, and providing a Telepresence VOIP bridge? yeah.. they've done that too. So, I suppose it depends on how you define 'Delivered.' Full disclosure: I work for an institution which is an Internet2 Member.