If someone requests the same file later, that transfer will take 10-20 seconds (warm). The first 5MB file you send will take 1 minute (cold).
The appliance takes data across the wire and caches it, sending only bits that haven’t been sent (incremental changes). Autodesk works directly with Riverbed and many firms already have it in place, but it’s important to know what actually happens. In the realm of WAN optimization, the biggest player is Riverbed Steelhead. They want to be able to work on files stored in New York while working from Seattle just as they were in the New York office. I get a common question on how to make users from multiple offices share the same drawings seamlessly.