Well, I got the TSB and I posted the basic information on the TSB in another post.

However since we are discussing it here.. In response to the two above asked questions.. I'm just going to say.. "I dont know."

I have no clue how WMichaels car said it was programmed as an SL.. I was just reporting on what he said.. lol...

As for how my clutch can feel different, I have no idea how! But it sure as hell does, and its not just power. It definately bites in more. When going into gear, I just can feel it engage a lot more than before, regardless of speed or RPMs.. I dont know how to explain it.. It kinda feels more responsive when putting it out of gear too.. (like 2nd to neutral)
I dont know how the PCM affects it.. but if you told me they put in a new clutch along with reflashing the ECU, or as they call it in the bulletin, Power Control Module, I'd totally believe it.

And looking back to when I first bought my car.. shifting was notchy and rough, like shifting through a bucket of rocks.. it got better with time.. but now.. its just so silky sexy smooth.

Is there possibly a difference between the ECU and PCM? I am guessing they are one and the same.

Also this TSB only affects those cars built on or before December 13, 2003.