Up until today I played OE on a 29 inch crt via scart on ps3. I could definitely detect a couple of frames of lag and dropped some tight inputs couse of that. Also the screen was kind of jiterish and it hurt my eyes when playing for more than a hour. I went into display options and changed the output to s-video (note that ps3 outputs s-video through the scart cable).
After that I saw a definite improvement both picture quality and no more dropped inputs or frames. The moment I pressed a button the move came out.
So if anyone else has a problem with frames on the ps3 I suggest you try this.