Huh... Spiderman is metahuman, i don't know what you are trying to prove here. I don't read Marvel, but i never heard people saying Daredevil can outrun a bullet.
Yes, not all speedsters got their power from the Speed force. Which makes the point to Cass being a meta even more acceptible.
But she can be a "normal human" even if doesn't make any sense whatsoever.