This paper considers performance of mobile ad hoc network (MANET) routing protocols with respect to group and entity mobility models. The three widely used routing protocols have been. investigated and compared: Destination Sequenced Distance Vector (DSDV), Ad-hoc On-demand Distance Vector (AODV) and Dynamic Source Routing (DSR). Mobility models encompass: Reference Point Group Mobility (RPGM), Random Waypoint (RW), Gauss-Markov (GM) and Manhattan Grid (MG). Simulations have been carried out using Network Simulator version 2 (NS2) and its associated tools for animation and analysis of results. We have developed a set of specific simulation scripts that are applicable for a wide range of MANET scenarios. Comparative analysis of simulation results includes network performance with respect to mobile node speeds and network size.