There's a level of speed in which I find acceptable. For some reason I find I have a certain limit or thresh-hold if you will.
I've sped up Beethoven's Moonlight Nr 3 twice as fast using Finale Notepad, and it sounds like crap. I've read up on C Changs book and our ears and brain can only interpret up to a certain tempo, and after that, it sounds like mush no matter how clear the notes are played even without the damper pedal. And further more, I felt that performance was lacking in musical content simply because I'm more acustomed to a slower 150 MM tempo.
I still have to praise Sinadinovic virtuoso skills though, lets see Liszt do that, or even Chopin himself.
Hearing this is about the total opposite how I'd interpret if Idil Biret would play it, although I have yet to hear her recording.