The possible comparison is the BostonWashington corridor but thats about it.
Actually, there are several other corridors besides Boston/Washington where there is sufficient population density to support high-speed rail.

General Electric and Chinas Ministry of Railways has signed a strategic MOU (Memorandum Of Understanding) to advance opportunities for development of HSR (High-Speed Rail) in the US. This collaboration will allow GE Transportation to be the first US locomotive manufacturer to more effectively compete for high-speed rail projects against global competitors.
Communities and companies seeking to build high-speed rail systems haven’t yet received the $8 billion in stimulus money the Obama administration promised for the projects, and already they want more a lot more.