Your wget is also very slow (22 seconds). Theoretically that might be caused my IPv6, but I don't think so.
Easy final test "time wget www.nu.nl" (which is IPv4 only).
Conclusion: you have a very slow systems and/or Internet connection. That's why the RIPE site is showing red logo's. I has nothing to do with IPv6.
Getting IPv6 on your system is easy: "sudo apt-get install miredo". But at the current state of your system/connection I think you have more urgent things to do: make your system and/or Internet connection faster. I can only understand your slowness if:
- you're on dialup Internet, and/or
- you have minimum requirements system (like < 512 MB RAM)
- your system is overloaded
- your Internet connection is heavily used, for example bittorrent using the full upstream connection
So if you want to solve that, start new thread.