Sorry to bring up something that's been done, didn't realize. As far as what it looks like, I'll get something like 4 songs in a row, then some other artist, then tree more by the first artist and then a couple more within the next 5 tracks. I notice this particularly if I've just listened to one album, then if I play a playlist including that and many other albums, the tracks from that album are at the end of the list. Or if I rip a new disc its tracks are at the start of the list.

I guess I just wish there were a setting that was to the effect of "no more than x songs in a row by the same artist". Or maybe be able to force a uniform distribution rather than random.