Using magnetic resonance data at several frequencies, we have obtained the temperature dependence of the field‐induced magnetization (M) in three concentrated spin glasses. At every frequency,Mis independent ofTforT≲TSGand drops linearly withTat higher temperatures. [M(0)−M(T)]/M(0) is closely represented by the function [exp(&Dgr;/T)−1]−1, where &Dgr; is a characteristic gap energy with values close to the corresponding Curie–Weiss temperatures &thgr;pbut much larger than the respective spin‐glass transition temperaturesTSG.