The theoretical treatment of class B amplifiers tends to be hugely misleading since they gloss over the fact that in solid-state amps they are (at least for audio purposes) always employed with negative voltage feedback in order to work on the frequency-varying impedances of speakers as voltage sources. So the crossover distortion effects are limited to the time the output of the comparison circuit takes for transitioning the complementary driver transistor bases across the voltage range where none of them are conducting, determined by the available current, the base capacitances, and the voltage gap size.