I know what you mean kmg..
How are you practicing resisting the urge to subvocalize? I am having trouble with this as well.
Are you incorporating the other activation techniques, besides just superreading and dipping? (mind maps, skittering, etc.)
I find skittering to work even better than superreading at times.
Also make sure you have a clear purpose and good mind probing questions, and your mind will help you find the meaning of the words you're speaking of. I forget to do this sometimes 
