Apparatus, and an associated method, for routing data in a communication device defined in terms of a protocol stack. The protocol stack includes an upper logical layer, a lower logical layer, and a mid stack layer. A determiner determines the configuration of the radio bearer by which the data is to be communicated. If a determination is made that the radio bearer is configured such that it does not require its application to the mid stack layers, a data bypasser causes the data to bypass the mid stack layer. If, conversely, the data is to be applied to the mid stack layer, the data is caused to be routed therethrough.