I'm still in my break in period so I'll test your theory out.
Originally Posted by Rob///M5
So, I picked the car up from service with about 1080 miles on it...launch control was still not functional.
Yesterday I tried it again with 1250 miles on it and immediately got the checkered flag.
So, it looks to me as if the launch control feature is hardcoded into the car's software to be disabled until 1200 miles is reached, regardless of what service the dealer performs.