PhoCusWright, with an assist from Compete, studied the fallout, and found that in the intervening months, traffic to airline websites increased, but their conversion rates declined.
Conversely, traffic to OTA websites decreased, but their conversion rates increased.
See the full story at http://www.tnooz.com/2009/11/04/news/ota-booking-fee-cuts-lead-to-more-converts-for-some-fewer-converts-for-others/