Having flown both CFM and IAE A320 versions myself, I know what you mean with slow spooling up. This is in fact the case on capturing an altitude or a speed. I doubt that it is the case in go-around or any other critical flight phases. Airbus has certified both aircraft and they deliver more or less the same performance.
The myth also stems from the fact that the IAEs need much longer engine start time, hence pilots see the slowness every day several times.
There is nothing to add to this TAM accident. There hasn't been any spool up because there hasn't been any spool DOWN! The TL remained in approach thrust, that's why they overrun that runway. Hasn't this been noticed yet?
And hellas! We have reached 100 pages of this thread. Let's be grateful and hope for another 100. Champagne!
Dani
