Excitations of three-dimensional spin glasses are computed numerically. We
find that one can flip a finite fraction of an LxLxL lattice with an O(1)
energy cost, confirming the mean field picture of a non-trivial spin overlap
distribution P(q). These low energy excitations are not domain-wall-like,
rather they are topologically non-trivial and they reach out to the boundaries
of the lattice. Their surface to volume ratios decrease as L increases and may
asymptotically go to zero. If so, link and window overlaps between the ground
state and these excited states become ``trivial''.Comment: Extra fits comparing TNT to mean field, summarized in a tabl