I have a 50/50 dedicated fiber connection with a rock solid 0.35ms ping to my ISP and a solid 8ms ping to drop box servers. To correct for this, we needed a new file that wasn’t bit-for-bit identical to the video file we previously transferred. "Dropbox has a deduplication scheme in place – what this meant for our tests is that even though we deleted the video file from our Dropbox folder, traces of it still remained and Dropbox got ~50% faster at transferring the same video file each subsequent time we uploaded it. Again, quoted verbatum from the blog post: Not only did they give themselves the preferential treatment of same LAN, they also intentionally adjusted their tests to discount an advantage of a competitor. In other words, people agreed with me because they knew what I said to be true. We’re confident that a slower Internet connection would yield similar results." It’s important here to note that Dropbox, Google Drive and Microsoft OneDrive all rate-limit uploads and do not fully utilize the 1 Gbps bandwidth available (in regards to the office Internet connection, not the LAN switched). "Our tests were conducted over local LAN – on the same switch – in order to rule out available bandwidth as a limiting factor. Maybe because 3-4 people actually read the Sync blog post where it states, and I quote:
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