We tend to keep it to important stuff only that the entire company needs to hear. But this past week we had a standup where everyone was supposed to answer a question (I forget what) and we did it in 10-12 minutes. We've been practicing for a long time, many of us come prepared. But even when everyone was expected to say what they were doing that day, we still averaged 10-15 minutes with 70 people. Just come prepared, don't dilly-dally.