Here's information on
how to read an MTF chart. Essentially, the higher up the lines are, the better the light transmission. Blue is for f/8, black is for wide open (f/2.8 for these lenses). Thin lines are resolution (sharpness), thick lines are contrast. And the dashed/solid lines have to do with resolution on the different diagonals. Essentially, the closer together matching dashed/solid lines are, the smoother the bokeh will be.
Here are the MTFs as they're given on the Canon website. Please note that the EF-S lens's horizontal scale does NOT match the EF lenses' (this is the distance from the center to the edge of the frame).
From left to right: it's the 60, the 100 (non-L), and the 100L.
As natek313 says, both the 60 and the 100 are very sharp lenses. Nearly all macros are cut-yourself-sharp.