No when I say top, I don't mean middle!
I mean the very top pair, even if they are tiny (and only if your plant already has at least 3 pair of leaves).
Here's a little more about it:
When you cut the top pair of leaves off with the growing tip, the plant will branch at that point. You aren't worrying about harvesting yet, you are encouraging your plant to get bushier, so you will have lots more to harvest later.