The hubs that I thought would kill does okay. Some of the hubs that I just wrote as an experiment has done well. Some took a few months, some only days.
This goes to show that google is unpredictable and that, although we should do our basic SEO, you'll never know which ones take off...showing us the importance of volume, experimentation and diversification. And then going all in on the hubs that turn out to be gems.