I find it pretty slow connecting to python.org. Actually this is why I asked my advisor for a Programming Python book. However, this problem does not show up on my laptop at home, so I guess it is a network configuration problem.
When doing a `telnet www.python.org 80', i saw telnet trying connecting to the IPv6 address of that website, and eventually timed out. Then, it tried the IPv4 address and got succeed immediately.
I disabled IPv6 for Firefox by changing the preference named `network.dns.disableIPv6', and everything went well. The problem may be caused by the router does not support IPv6. I'll shoot Daisy an email asking about this.