You can get FP during the morning EMH but the return times are for after the park opens- normally at least 30-45 minutes after opening. In other words the machines are open just as they would be any other morning but the FPs themselves don't start until there normal time after opening (FPs while avialable right at opening are not good immeadiately. Normally they begin at the 1 hour mark except on the biggest of rides which begin about 30-45 minutes after opening.
They don't have FPs for use during morning EMH because the lines aren't long enough to make it a need during this time. We can generally ride about 5-6 things during a morning EMH at the MK. (normally we choose Buzz, Space Mountain, Rockets, Teacups, get a Pooh FP for later, Pan, and Small World.)