Netflix today posted a list of the best performing ISPs in terms of streaming Internet video. The company states that HD streams have variable bitrate but can potentially top out at around 4800 kilobits per second, and the data provides a bird's eye view by ISP of sustained throughput available from a given ISP over time. Looking at the company's charts, Charter Communication interestingly tops the rankings, with Clearwire (for obvious reasons) coming in last. AT&T and Verizon show up in the middle of the pack, weighed down by the significant number of users still on sluggish DSL connections. With the majority of their users also on sluggish DSL, Frontier Communications checks in only slightly better than Clearwire. DSL providers clearly lag in the rankings, something mirrored in the graph of Canadian ISPs.