I am using the same Google account to register for Super User as I did for Stack Overflow, Server Fault, and IT security, but my Super User account doesn't show up on my network-wide profile accounts list. Below is the link to my accounts list, not sure if it is accessible to other users or not:
You registered on Super User about
10 minutes 14 hours ago. I suspect the linked page is heavily cached, give it some more time(a day or two) to sync the new account.