Wait, lemme just make sure we're thinking about the same spot: . 6:16 or 6:36?
Or something else entirely?
I assume you're talking about 6:36. 6:16 is difficult at the tempo that many people (including Argerich above) play it at, but I think it should be taken significantly slower. I can handle it at a tempo above what I think it should be. 6:36 is pretty nasty though... Could you elaborate on what you mean? How you recommend I practice this, or perhaps how I could use the etude (or no. 8?) to help?
Yes, the whole development section 6:16 and on. You come out of the "leggerio" section, which, in tempo, is already FAST, and Chopin brings that section to a conclusion with a marking for "crescendo ed animato," and he's not just whistling Dixie. He means it and Argerich, in this performance you posted, hits it perfectly, flying into the argeggiated development with a fury that it requires. it's the climax of the piece. If you take it "significantly slower" there, you certainly make it easier on yourself, but you trash the biggest moment of the Scherzo. This is the BIG moment. Argerich does it with astonishing power. So does Benjamin Grosvenor, and, well, every other pianist worth his or her salt.
So, you see, you can't just slow it down "significantly" there unless you want to sound not only technically challenged but also musically stunted.
I think you see, then, that this Scherzo isn't that easy at all -- especially at this crucial moment. It's damned hard and very taxing.
And our friend "werq" is right in suggesting that Op. 10 No 8 is a better Etude for working on this particular problem than Op. 10 No. 1. Practice No. 8 and you'll see the parallels. I like Opus 10 No. 1 for its stretching demands, too.
In that Trio development, examine your fingering to see if it more corresponds to what Chopin indicates in Etude No. 8. You can't let crossings of 4 over 1 (in the descending arpeggio passages) get in the way. It's complete arm movements to get to the positions. Smooth transitions with arm movement and as little wrist action as possible. If you find your wrist doing most of the work, you're doing it wrong. And if the wrist takes over, you'll never, ever get the tempo to where it should be. Plus, your hand will turn into a claw.
Your teacher should be aware of this. Check in with him or her to help you. This piece is deceptively "easy".