Sorry, I'm getting a little long winded here, but it has been a long day..
So far I've seen these outputs for uptime in NetBSD 1.6.2 (The version I'm using).
9:55AM up 1 min, 1 user, load averages: 0.11, 0.12, 0.14
10:55AM up 1 hr, 1 user, load averages: 0.11, 0.12, 0.14
12:00PM up 6 days...