Aloha,
No. Most definitely not.
Steakhouse 55 features a magnificent breakfast. The best at DLP. However, it is NOT a fast serve counter service restaurant. It is a table service restaurant which takes their time to provide a quality meal. My family enjoys Steakhouse 55 for breakfast on days we are NOT going to the parks. Everything is outstanding.
For DCA RD at 9 AM, recommend to be at the gate by 8:30 AM. Depending upon where you are staying, have an early breakfast. If you are staying at DLH, the coffee shop opens at 6 AM. Also, the pair of Starbucks at Downtown Disney are open early and feature breakfast items to go. You can eat in line if you desire. Lastly, some of the various food carts (Churros, etc...) open as early as 9:30 AM at DCA. As well as Schmozies (msp?).
If at all possible, use EMH.
Good luck!