Bird strikes over 50% reduction.
From 2012 with 45 aircraft included and data till February 2017 indicated favourably, by an over 50% less bird strikes on modified planes.
Why would you wait till November 2017 when the project ends to make this inexpensive change on all applicable aircraft?
Non changed aircraft 1 bird strike per 1,000 flights
Verses changed aircraft 0.4 bird strike per 1,000 flights.
(If each aircraft did 1 flight a day every day of the year for 5 years that's 82,125 flights or a lot of bird strikes - But I would take 32 over 82 any day)
But I first saw this back around 2000, so I think it is a stolen idea.