Multiple requests sent in series (e.g. because each depends on the previous one) is also a problem with web apps. When you're developing locally or testing on a staging server near you, the latency is negligible and you might not notice.

Chrome's developer tools allow you to disable caching and choose to simulate a specific network type. Most people know those settings restrict the throughput. But they also increase the request latency. They do this on a request-by-request basis, not at packet level, so it's only an approximation. Still a good test.