We were there from the middle to the end of September, we visited HS twice in that time with the intentions of arriving around 6:30am. The first time we arrived around 7:30am and the second time around 7:00am. We were staying at Shades of Green both times (stating this as we moved four times during our two week stay), and the transportation provided was pretty bad, at least compared to the Dolphin and such. Of coarse, we found this true of Coronado also. This would be a different conversation though.
Our plan was to stay on Sunset Blvd and Toy Story Land until our Oga's reservation, which was around noon one day and around 1:00pm the next. This plan was because some of the MFSR's highest wait times were during the morning. So on the first visit we were able to ride TOT twice, RnRC three times and TSM twice before crowds picked up. The second visit worked out a little better allowing us to ride Slinky once and the others a multiple of times, we could have road Slinky more but it's not or favorite ride. The only reason we made sure to ride on that morning was because we had someone with us that has never been before, they too were not impressed with it.
Anyway, the Extra Magic Hours were well worth it for both HS and MK, AK was nice also, but even on normal mornings (non-EMH), we never have a problem getting on EE and Dinosaur, usually leaving FoP for FP+ and last ride of the night.