On the last Disney Dish podcast
@lentesta ran through the numbers on how back in 2013 (there was a lawsuit) that 3% of park guests have a
DAS card. Those 3% took up 30% of the
Lightning lane (Fast Pass back then) capacity and this 30% double the stand-by wait times.
He then ran through a recent scenario where Touring plans counted 1500 people getting into the Haunted Mansion Lightning lane line in one hour. Touring plans have determined that less than 300 slots are allocated to Genie+ per hour slot. So, 1200+ people were either rider swap, DAS or VIP tours. They counted zero VIP tours that time slot. 80% of the lightning lane capacity was non-Genie+. An insane number. This is likely why 3rd Part VIP tours have been banned.
DAS is being abused and it is almost impossible to deal with that without getting into law suits and PR trouble.
This type of information is very important to consider when analyzing waitimes and guest experience.