I dove there once about 10 years ago. I'm trying to remember now what it was like. We went north of the little bay that cabo san lucas is in, on the sea of cortez side. As I remember, there weren't a lot of corals, and the water was a little cloudy. But again, I only went once, and it was a while ago. Sorry, I guess that's not much help.
Yes, I was there in June 2001. Diving was not that great that week, water was very cloudy and visibility was less than 30 feet. I don't think there was much coral reef, at least I didn't see any during my two dives.
Tuna fishing was great, we max out our limit three days in the row.