Now, I suppose this study is useful if it describes how you would actually use your miles:
You want to fly domestic coach, and on your own airline’s ‘busiest routes’
You will only look on an airline’s website, you will not do your own research or even call the airline
You make your bookings in March for summer travel

But for anyone who wants to travel in international premium cabins, on partner airlines, or checks for award space either early or last minute, this study tells you absoltely nothing.