Every once in a while I'm still surprised at the potential upside of pipelines.
I stumbled across a great example recently: Women In Technology International. That home page is setup in a pretty typical newsletter format. It has 159 resources, 145 of which are images along with about a half dozen pieces of js and css. Most of the images are small, with over 2/3 of them loading in less than 20ms of transfer time (time to first byte removed).
What is striking about this page is how large of an advantage pipelining can give even on a well connected broadband desktop with a 100ms RTT to the witi hosting facility. The average latency to receive the first byte of a resource dropped from 1697ms to 626ms, and the average elapsed time per transaction overall dropped from 1719ms to 652ms. Aggregate that over 159 different resources and you have some serious gains!