Ok I can give you a little more information :)
When QuoteCenter is started up, it does actually talk to the download servers and is responded to. After it gets the the 'Starting data retrieval' point it starts exchanging packets with 192.165.218.19 (ISP: SE-REUTERS) for 15-20min:
2099 511.475681 192.165.218.19 <local IP> TCP 7983 > vrts-ipcserver [PSH, ACK] Seq=58825 Ack=815725 Win=25776 Len=1032
2100 511.650279 <local IP> 192.165.218.19 TCP vrts-ipcserver > 7983 [ACK] Seq=815725 Ack=59857 Win=65535 [TCP CHECKSUM INCORRECT] Len=0
It does the above (Reuters sends PSH, Acknowledge and QuoteCenter responses Achnowlege) repeatedly until Reuteres sends through a Acknowledge, Finish packet:
2118 522.934953 192.165.218.19 <local IP> TCP 7983 > vrts-ipcserver [FIN, ACK] Seq=61921 Ack=816057 Win=25776 Len=0
After this point it simply hangs. I've closed down Symantic AntiVirus completely and this seems to have no effect.
Absolutely nothing happens in the window, all fields are left blank except 'Characters Per Second' which gives a completely different number each time I start QuoteCenter (as low as 7172, as high as 50544).
Hope that helps!