We did the 8:05 seating at CRT last October on a non-EMH day. We arrived at the MK at around 7:45 (we were the only ones on the bus). They have a line set up just for priority seating guests. I think they let you through right at 8:00. We went to the castle, checked in, and were seated right away. We had seen all the princesses (felt a bit like an assembly line) and were finished eating by around 8:45.
We left the castle and went down to the tomorrowland bridge. All the lands are still roped off. We met a father with his little girl who also had had breakfast early and we all waited together at the entrance to tomorrowland. At about 8:50 or so, this super nice CM came up to the rope. He asked us if we were all going to go straight to Space Mountain, and of course, we said YES!!
He went ahead and let us through before any crowds came down and we were the first (and only) riders on Space Mountain that day!!
By the time we got off, people were in the park.
It was great.
We also had an 8:05 PS at the Crystal Palace the year before and I got some great shots of the castle with very few people around.
I love having the first PS seatings of the day--it's always just DD and I and we get finished eating before the park opens and station ourselves in front of the rope in whatever section we plan on visiting first.