Relative to existing approaches, EtE monitor offers the following benefits: i) a breakdown between the network and server overhead of retrieving a web page, ii) longitudinal information for all client accesses, not just the subset probed by a third party, iii) characteristics of accesses that are aborted by clients, and iv) quantification of the benefits of network and browser caches on server performance. Our initial implementation and performance analysis across two sample sites confirm the utility of our approach. We are currently investigating the use of our tool to understand the client performance on a per-network region. This analysis can aid in the placement of wide-area replicas or in the choice of an appropriate content distribution network. Finally, our architecture is general to analyzing the performance of multi-tiered web services. For example, application-specific log processing can be used to reconstruct the breakdown of latency across tiers for communication between a load balancing switch and a front end web server, or communication between a web server and the storage tier/database system.