I think it means you are not good enough to be interviewed outright, but not bad enough to be rejected outright either. They want to compare you to a larger pool of applicants that will be applying over the coming months. I have a couple of interview holds and that's basically what it said in the email I was sent. I assume they are being honest.
If one of your holds is from GW then don't give up hope. They are notorious for putting a large amount of apps on hold, but many people who later get interviews say they had been previously put on hold before the II. Just wait it out