Such a means of diagnosis has been proposed as a screening tool, and Harvard continues to test this approach online (video and survey). If administered by first tier health care service providers such as GPs, referrals could then be made to specialists. It is unlikely that the 7 questions will be enough for a full diagnosis. A full examination by specialists will be required in any case before intervention can commence.
The full paper can be found here
The group's facebook page is here
It remains to be seen if the software can distinguish ASD from ADHD, or another developmental disorder or challenging behaviour. It would also be nice to think that international roll-out of the software, or online international access is not impeded by patent rights or prohibitive costs.