what I meant when I said 30 hours isn't much was that 30 hours isn't a lot of time to shadow just one dentist. Now, if you have kids and a wife and a full time job...then it would be hard, but I don't think you do, so I meant that you should just shadow ONE dentist for 30 hours, get it done, and then if you want to see what other dentists or specialists do, then go and watch them too for a couple hours each.
But if you really want to find out the answer to a question like this, SDN isn't the best place to ask since very few if any ADCOMs come in here. Why not just call VCU and ask them. Otherwise, I suggest you just follow the rule as it seems to be laid out rather than screw over your chances at the school on a hunch.