Is there some special training that DJs who either do radio or instore programmes go on so that they know when failing to back-announce a song will really annoy the listener ? (or at least cause a slightly disgruntled case of "well I wonder if I'll ever find out what that was...")

Have just been in HMV at lunchtime and found myself liking what was on the instore radio - it then went straight into "Your Love Alone" by the Manics. On comes the announcer at the end of that one and tells me exactly what the Manics was and which album it's on but no mention at all of the storming track that went before that I now can't remember anything of so I guess I'll never know. Radio DJs do it all the time - yes I know that was Justin Timberlake, what was the one before it though ?

Of course, I could have asked the staff but I wasn't sure they'd have known either - that's the thing with instore radio as opposed to the "now playing" display where they've loaded six CDs into a multi-changer and stuck it on random, at least you can see what they're playing and go and have a look at it.