A fact from Rose and Ottilie Sutro appeared on Wikipedia's Main Page in the Did you know column on 16 April 2009 (check views). The text of the entry was as follows:
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Is a term I've never heard before - is it purely a US term? The entry for the Sutro sisters in footnote 1 has the phrase "originators of the two-piano recital ("duo-piano")". If this is what "duo-piano" means then perhaps it should be more clearly stated in the article. I think it looks a mess at the moment with "duo" and "piano" having links to separate articles. 132.244.246.25 (talk) 10:04, 16 April 2009 (UTC)[reply]
I have not researched the term, but "duo-piano" would contrast with piano duet, which is usually two players on a single piano, where the former has two players on two pianos.
Has the question of the legality of the sisters' actual sale of the manuscript never been raised? Since it was conducted under false pretences, I'm mildly surprised that no attempt has been made (if indeed that is the case) by Bruch's heirs to recover it.