How is his reading fluency? You can qualify with Broad reading scores as well. It's tough for all of the achievement test used to qualify for DYS seemed to have a timed section in them somewhere. For purposes of DYS qualifications you could attempt a portfolio with his IQ scores and test on achievement only if they ask for more information. I think I have heard others mention they will allow 6 months to submit additional requested results.
You could try to set up a "sting operation" with the video camera
Maybe others that successfully used a portfolio could pipe in with their experiences.
