I don't think it's physically possible for one nurse with seven patients to do so. Most places share the job with a CNA, so it is really every two, which is consistently doable most days. But if it's just the nurse with seven pts? C'mon!
Why does administration think that a meaningful round is a minute per room? Sometimes, I'll walk away from a patients room after 15 minutes (toile ting, answering questions, getting water, calling dietary because the pt is unhappy with the food). And that is someone who is stable!