It's not nearly as interesting, but if you're (understandably) reluctant to connect your Gmail account, the demo data sets out fairly plainly how much can be established just from the to: and from: fields[1].
Also at 20 minutes and counting, I am actually I'm more curious to see if it will ever finish not when.
As for your time counter of 20 mins, that is a bit odd. Has the first version of the network not loaded for you? If you are on the /viz page, just refresh it. If the server has fetched at least the first batch of metadata, then the corresponding network will load immediately, and the rest of the fetching will happen in the background. Please note that we are also having heavy traffic at the moment; so the fetching process could be a bit slow.