Yup! Shes slow! With my 55# and 26 inch draw length, what do you really expect? If it was up to IBO specs, it would still be incredibly slow compared to the new Bowtechs, but I guarantee its ALOT smoother and just as quiet.
I wouldn't sell it so short. Just for fun I plugged your numbers in to some software I have and scaled them up to the IBO 70#, 30" dl, and 350 grain arrow. The orangish cells are calcualated and the white cells under (1) and (2) are input. (1) is the conditions of your set up and (2) are IBO. I assumed a 125 grain virtual mass and I increased the brace height on (2) to 8" in order to keep the SEP in proper range. Though these are just guesses I think they are very reasonable. Note the speed comes out to pretty close to 300 ft/sec.