On our HS RD, we got into the park at 8:30, signed up for Jedi Training, and were towards the back of the pack moving into TSL at 8:50. It was a slow, crowded march until the CMs started calling for SDD folks to stay to the right. Once that line formed, we practically skipped to AS2, rode, and were in line at TSMM before 9am. At that time, the wait was about 10 minutes.
I wouldn't want to be in the RD pack actually waiting for SDD, but following the back of the crowd to the rest of TSL was relatively painless and highly effective.