There exists no official SDC timing for etude opus 10.3, 10,6 and 10.11. Opus 10,3 is blank. Therefor I have used Pollinis timing. opus 10.6 is also blank therefor I have also used Pollini for this one. OPus 10.11 is"faster than Cortot will do it". Personally I havent got the Cortot CD at this moment therfor I use Pollini for this etude to. I am not sure if the SDC board would approve this since Pollini is even slower than MJ(26.52). But I hope the SD board still will take this serious and make MJ in to an anti SDC and an enemy of this community.
If I remember correctly, Nelson Freire does it in 20:14, saves up a lot of time in the 10/9. (without pauses, that is)
I could of course be very wrong, not that I care .