We have compared various theories for the dielectric response of suspensions of solid spheres in an electrolyte, due to electrochemical double-layer effects. We find that all theories have close to the same frequency dependence, which can be described by simple approximate formulae. The asymptotic behavior is the same : at high frequencies, epsilon’ varies as omega(-1.5) and epsilon " as omega(-1.0). At low frequencies, Delta epsilon’ varies as omega(0.5) and epsilon " as omega(0.5). The theories predict somewhat different magnitudes of the dielectric response, The approximation starts to break down when the double layer is of the order of the Debye length.