Congratulations!!!! I feel like a kid in a candy store reading your summary even though its not my car lol!OMG, yes! On the drive down to the shop, I made use of "Insane" mode several times at highway speeds just to get a fresh baseline in my head. I also did a few 0-to-whatever launches in Insane mode (not using 'launch mode'). But after the new pack was installed, in every aspect (launches, highway passing, etc) the acceleration is significantly improved..and not just by a little, but by a lot! Sometimes I tap the peddle a little to quickly and it's quick to remind me "Hey buddy, you have Ludicrous mode now!!! Chill out a little.".
I have yet to actually try 'Launch Mode' as it's not easy finding a suitable stretch of road around here.
Considering you already had a very fast car to begin with, I can't even begin to fathom what the difference would be going from a 75D to a P90DL is.............................
One day when when I have the cash to burn, I would love to do this................