At the end of it all he was able to perform the 'Revolutionary' at speed in the prescribed octaves. It astonished Mendelssohn when he heard it at the Leipzig Gewandhaus concerts, and it obviously made Liszt sweat a little when Dreyschock began single-handedly to usurp his Viennese audience. At his next Viennese concert, Liszt purled through Chopin's Etude in F minor, Op 25 No 2. After the rapturous applause, he repeated the first bar slowly and tentatively - in octaves. Then again, a little faster. Then he really sped up and whisked the entire etude into an octave souffle. Talk about one-upmanship! Liszt remained King in Vienna, but Hans von Bülow couldn't compete with Dreyschock's success there.