I have to disagree with the last paragraph. 1. Quantitately: ABBA had 10 top 20 hits during their lifetime. Certinaly that pales in reflection to their European performance, but it's hardly something to sniff at. 2. Anecdotally: I can testify personally to the fact that "Dancing Queen" was ubiquitous in 1976-1978 even in the rural American town where I grew up. If you want to say that it was given short shift by the critical press, that's one thing I guess, but even I in my short pants realized they were huge.