  We discuss a wealth of data from various types of experiments which together
suggest that the superconducting state of optimally to overdoped BSCCO-2212 can
be well-described by the BCS theory with a d-wave gap together with small-angle
scattering from out-of-plane defects. These include scanning tunnelling Fourier
transform spectroscopy observation of nanoscale inhomogeneity in the local gap
edge position, the narrowing of the antinodal ARPES spectrum when BSCCO becomes
superconducting, as well as the behavior of the microwave and thermal
conductivities. We suggest that the large amount of small-angle scattering in
BSCCO can account for the differences between the superconducting properties of
BSCCO and YBCO.
