Some people did, yes. There were still quite a few people working when I went to bed at 6ish, though, and some of them were still there when I got back 3 hours

Some people did, yes. There were still quite a few people working when I went to bed at 6ish, though, and some of them were still there when I got back 3 hours later to finish up the last pieces. And if they did: so what? It wasn't a competition and if it was it would be impossible to decide what level of preparation would be "too much". I'm hoping for a sequel next year.