in some ways, it is hyperbole on my part. In other ways, it depends on the culture of the particular Soto community you're talking about.
But, my own study of the Soto school's history -after- Dogen tells me that they did begin emphasizing Zazen more and more. But again, that's a broad generalization considering the variety of teaching styles there is within the larger Soto community at this point, from traditional to modern.
For example, a typical service at my own temple includes two half-hour to fourty-five minute periods of seated meditation, broken up by 15-20 minute periods of kinhin (walking meditation). Zazenkai and Sesshin schedules usually include around 4 hour work-practice periods. At least at our affiliated monastery here in Oregon. During Sesshin, they might have two four-hour zazen sessions with dharma lectures dispersed. remember that these people are generally waking up at 5am, meditating and working the monastery grounds until lights out at 10pm.
 in my own understanding, factoring in my own personal take on Zen, like I said I admire the Kagyupas (but particularly the kagyumas, lol) for their emphasis on practice/perfection through action. Of course, their doctrines and philosophy may differ, but i like how Jetsunma Tenzin Palmo put it: the dharma is like a clear elixir. in every culture that it has encountered, that same elixir is placed in a different receptacle. In Nepal/Ladakh/Tibet, it might be contained in a jeweled chalice (or maybe some poor dead monk's skull). In japan, an austere minimalist wooden bowl. But the elixir is the same, no matter what.
My own roshi has said things like "these schools and traditions are all just different varietals of flowers in one garden." also "the more dharma, the more dharma."
"Cause is not before and Effect is not after"
- Eihei Dogen Zenji