That's focusing screen and it's normal... and it should be that way. It's not completely transparent, otherwise you would have trouble seeing DOF and where you have focus. Grain is more visible in higher f-stops.
Ef-S screen is even more matte to further help with seeing DOF.
It's possible that focusing screen in 60D is more grainy. In xxxD DLSR you have pentamirror, in xxD you have pentaprism, which gives more light, and therefore screen can me more matte and still pass enough light for lightmeter.