if you can do his workouts, great. go do a race with him and see how you stack up.
also, sage doesnt do any ridiculously fast workouts EVER. he's not really a marathoner any more, he's an ultrarunner. he does ultrarunner workouts like long hilly runs, not track workouts.
he's also living in boulder so everything is at or around 5000 ft
And that is why he can't beat many of the top women.