Finally i would advice to realise yourself that it will take VERY long (months/years) to be able to play the etude at the speed as indicated on the sheetmusic. Feel free replying comments!
The advice is somewhat general and does not tell us any way to apply the knowledge for Chopin Etudes exclusively. Proper advice would pretty much require an entire book.As for the time required it is different for everyone. For an professional music student I really believe that you can learn and master one of the etudes in less than 2 weeks, with 3-4 hours a day work. Any longer means you are not ready to tackle the technique and should acquire it elsewhere. You should be able to sight read at least 50% of the score at first reading and know how to develop it further within days to near 100% read rate.Want good advice for those not ready to learn these etudes? Do not learn these etudes you will waste your time. You can learn technique which builds to this elsewhere.To use the Chopin etudes to fix your technique or to initially acquire technique from, is ridiculous. You use these etudes to affirm that your overall piano technique has solid foundation, not use it to build the foundation.
Basically good advice not just for Etudes. I'm not sure about #1 though; I listen to recordings to get an overall feeling for the interpretive possibilities and the shape of the piece, but I'm not sure I would count on them to save time learning the right notes--that is best achieved as a result of close attention and analysis of the written notes themselves.
Finally i would advice to realise yourself that it will take VERY long (months/years) to be able to play the etude at the speed as indicated on the sheetmusic. But the great thing is that you WILL notice that your technique is increasing.