The relation between generalized scaling laws, or equivalently light-cone behavior of current commutators, and equal-time commutators is investigated. In particular, the finiteness of the Callan-Gross integrals over equal-time commutators does not imply Bjorken scaling. It can happen that W2 or even (1ν)W2 scales. Also, even in the cases of forward matrix elements, the correspondence between light-cone and short-distance singularities is not one-to-one in general. The various cases are investigated. Operator Schwinger terms and their relation to the longitudinal cross section are also discussed.