I would expect the very slowest connections to be T1s, which have excellent latency (and reliability) but almost no bandwidth. Then DSL/cable connections, with

I would expect the very slowest connections to be T1s, which have excellent latency (and reliability) but almost no bandwidth. Then DSL/cable connections, with bandwidth between 5 and 100Mbps. Anything 100Mbps or greater would have fiber, with the correspondingly low latency again.