the group that trains in boulder - which has included noguchi and some 2:06 - 2:07 guys routinely run terribly, terribly slow. i have passed them while i was going 8:30 pace. sometimes they walk, sometimes they do this light jog/walk action. sometimes, mid-day during the summer they will do a slow jog or walk in full sweats and a hat. you tend to see them going very slow, which is more often than not. other times they can be seen doing ~5 mile loops around the res, with each lap getting faster and faster until they are running faster than marathon pace after 4 - 5 laps. other times they can be seen with the straining samuri face up by eldora at 8000+ feet. other times they are up at silver creek high school in longmont belting out hard interavls, or at fairview in boulder, followed by barefooted strides and form drills. all done under the stoic eye of a coach and some assistants wearing khaki business casual pants and a golf shirt, with clipboard in hand.
the thing about the japanese is that they can crank out sub 2:10 guys like they crank out toyotas on the assembly line. they do heavy, heavy volume at a terribly easy pace, sprinkled with a few very intense interval workouts and progressive long runs.