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In this work we propose the use of more detailed graphics to study the performance of routing protocols for mobile multihop ad hoc networks when studying the feasibility of providing quality of service to upper layer real--time applications. Classic success ratio and round trip time curves provide important parameters to study and compare routing protocols, but they also mask valuable information about the evolution of the network. This masquerading is due to the averaging techniques used in classic curves. The dynamic behavior of the network makes these curves inappropriate when analyzing routing protocols with quality of service constraints. In order to obtain more detailed graphics, we propose the use of time windows and discrimination of the results on a per link basis. Our proposal provides better comprehension of the routing protocol characteristics and its applicability to quality of service in mobile multihop ad hoc networks.