Last week we scored 4 tickets to Glasgow next summer on NW -- 2 Business and 2 coach -- from our preferred departure points of LEX and SCE. On the dates we wanted, too.

You can check the annual reports filed with the SEC to see what proportion of seats are used on award tickets for various airlines. Last time I checked, Delta and American led the pack with about 9% of their inventory used on awards.

Otherwise, all we have is anecdotal evidence.