Interesting. Chicago goes up to vps 63 which I assume are nodes? What's the standard # of users on a given node?
Not only is it unlikely that the site will tell you, it'd also be completely useless information. What if all of your shared node users are idle? What if all of your users are running gaming servers?
In any event, most virtual server farms have some forms of load balancing so that resources on one server aren't sitting idle while another server is overwhelmed, so the number of users could change at any time.