This clip contains three samples of the opening music to the TV series HOUSE MD as broadcast in Australia on Digital TV (terrestrial):
1. Correct speed (as broadcast in 2008)
2. With PAL speedup (as broadcast in 2007)
3. Version 1 again
This is relevant to the thread What's the problem with double-blind testing? at post #330 (http://www.hydrogenaudio.org/forums/index.php?s=&showtopic=38041&view=findpost&p=691198).
Although the difference is quite marked when the samples are contrasted with each other without delay (e.g. with an immediate ABX test), most people watching PAL TV do not notice whether a particular TV episode is being broadcast with PAL speedup or not.