Our RS experience was all over the place last week. I have a 2 yo who is too short for rides and any time I asked for RS, they asked to see him (luckily I brought him with me so this was an easy request to fulfill- I may have had to step away from in front of his stroller, or have one of my older kids move over to make the little guy visible, but they all asked to see him). I wouldn't count on RS if you have a child tall enough to ride (YMMV- I'm sure some CM's would gladly issue it, but there are some who would not).
At each ride, the second rider (person waiting with the non-riding child) and the 2 people riding with the second rider had to also be present. RS was added to my account and to the other 2 accounts and we were told what time we had until to use it (sometimes as little as 15 minutes- so we would not have had time to ride another attraction). This was uniform each time we asked.
Space Mountain, 7DMT, Soarin', Splash Mountain, Thunder Mountain, Everest- all 6 riders had FP. RS was added to my account (as the second rider) and my 2 older kids so they could ride a second time. This was done with varying degrees of explaining, waiting, and annoyance (and this was where everyone DID have a FP). The handhelds they use to add the RS to the account frequently die and need rebooting or just plain do not work. At each attraction, I had to wait behind any other party needing RS or other assistance such as
DAS (or just those who claimed to not understand that 1 person having FP was not sufficient for all 10 people in their party).
FoP- 3 of our party had FP and 3 did not. We had no issue getting RS for me, and adding the other 2 non FP holders as my additional 2 riders. In fact this was the smoothest transaction we had the entire week and I was fully prepared for battle. Had not done FP for all 6 because my 2 older kids were certain they did not want to ride and then changed their minds and I figured it was worth asking and I'm glad I did.
Slinky Dog- Disaster. Only 3 of us had FP (again because the older 2 kids thought they would not want to ride, then saw it and did want to ride). I approached the CM fully prepared to hear we were out of luck but she said it was fine- and then it wasn't. After DH rode with my parents, I walked 5 feet from the CM who just "added" the RS and said it wasn't a problem over to tap in to use RS and it all came to a grinding halt. The Mickey lit up blue, the CM got an attitude and stated she thought we all had FP (I had told her upfront we did not). Me and 2 older kids were almost not able to ride (I would have understood that, because in fairness we did not have FP regardless of the RS issue) until another CM came by, saw my frustration, and let us through.