I agree with Tim I have been a DBA for 6 years and only recently decided to go for OCP status (a personal acheivement thing rather than money orientated) I found by studying there was large gaps in my knowledge so I found the process a very positive one.

I think many people approach the OCP with the wrong frame of mind - it is not a guarenteed doorway to riches it is simply confirmation (if you didn't cheat) that you understand the Oracle concepts.

Personally when I employ/interview DBA's I still test their ability (OCP or not!) and experience more definitly shines over a piece of paper.

Regards