Just got back today.
We were a party of 9 and had absolutely no problems at all in getting 9 FPs for each park. I was ready to politely and firmly argue for one at MK, but that was one of the quickest ones we received.
Our only issue with the FPs is that many of the CMs covered up all the machines after the regular FPs were gone. One CM even told me that my special FP card wouldn't work. We lifted up the cover, inserted my card and out came the GAD FPs!!!
So be prepared to talk to a CM if they forgot to leave a machine open.
Also, I heard both "yea" and "nay" when it came to getting the GAD FPs for EMH. Most times we could but at AK the CM wouldn't let us (Dinosaur and Everest).
Finally, we found DHS the best place to use our FPs (TSM, RnR, ToT and Mermaid). The 2nd best was MK. However, we had 4 FPs so we used one at each park (did 2 in the AM and 2 after 11am and none were problems).
Crowds are HIGH -- our day at DHS there were 22 tour groups!!!!!
We would have gone to another park but had already gotten our special GAD FPs. We had a 30-35 minute wait in the FP line for TSM...had an actual line at Tomorrowland Transit Authority (!!!) on another day.
The GAD FPs were a god-send!