See my update from today: https://steemit.com/life/@libertyteeth/delegating-to-minnowbooster-progress-so-far-after-four-days
I've delegated 10k and have earned roughly 7 SP daily for the past 7 days, so with 1/10th that you should be earning 0.7 SP a day.
Note though that I just got started, and 4 data points might not show larger trends...