From two corpus studies into varieties of clausal coordination in English (Meyer, 1995 and Greenbaum & Nelson, 1999), it is known that the incidence of clausal coordinate ellipsis (CCE) is about two times higher in written than in spoken language. We present a treebank study into CCE in written and spoken Dutch and German which confirms this tendency. Moreover, we observe considerable differences between written and spoken language with respect to the incidence of four main types of clausal coordinate ellipsis—Gapping, Forward Conjunction Reduction (FCR), Backward Conjunction Reduction (BCR), and Subject Gap with Finite/Fronted Verb (SGF). We argue that the detailed data pattern cannot be accounted for in terms of audience design, and propose an explanation based on the assumption that during spontaneous speaking—but not during writing—, the scope of online grammatical planning is basically restricted to one (finite) clause.