How strong is the evidence for electroweak corrections beyond the running of α?

The evidence for electroweak radiative corrections not contained in α(mZ) is examined. At low energies there is very strong evidence in the analysis of the unitarity of the Cabibbo-Kobayashi-Maskawa matrix. At e+e- and p bar p collider experiments the current direct signals are not strong, but there is substantial indirect evidence, which will likely become sharper when mt is determined. The advantage of using (Δr)res as a measure of these effects is emphasized. In order to improve the direct evidence, more accurate measurements of mW and the on-resonance asymmetries are indicated