pathological networks
We built an on-campus ATM network and bought access to a MAN (ATDnet), but the only WAN available was the ACTS satellite
Our network was very long and very fat: OC3 (155 Mb/sec) over satellite (500ms RTT).
We were expecting standard LFN-related problems; the solutions are fairly well-known (window scaling, PAWS, SACK, etc.)
What surprised me was something else: interactive performance!