Come to think of it the results are a time-warp of marathons in the old days (except the sub 2:10's of course).
Pack run is right. I did it. I'm used to running basically alone in marathons; this was more like a 5k with a pack of Japanese guys running tight around me (or drafting behind me) up to about km 32-33. Stretched out a bit after that. I got clipped a lot; my long stride didn't match the quick footfall of the Japanese runners. Anyway, pretty fun run.