...well, that's just changed. Now, if you're logged in as a paid user, you "cut in line" of other web requests that have been received but not yet generated a response. Basically, the load balancer retrieves all incoming web requests immediately after your browser sends them, then sorts those requests into two lines: free users and paid users. Whenever a real server (not the load balancer) is ready to do more work, it always fulfils a request from the paid user line, and only does free user requests once no paid users are waiting. Deeper explanations can be found here.
Membership has it's privileges, eh?