We were at WDW 2.5 weeks ago. We did SDD at early entry. We were at DHS a few minutes before 8:30 and they had already let people in, so we were a little behind the curve, but we still only waited about 20 minutes. After SDD, we walked straight onto Alien Spinning Saucers and then headed to Toy Story mania with about a 15 minute wait. By the time we finished with TSM, SDD was an hour and TSM was 45 minutes.