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Normal. Not just you downloading right now. There's thousand of people overloading the servers. All you can do is wait.
 
Why would Cydia load fine on a tethered JB then? It still works fine for me.

[EDIT]
Ahh, you actually have to download the Cydia app. I'm not used to Greenpois0n as Redsn0w comes with it.
 
Why would Cydia load fine on a tethered JB then? It still works fine for me.

Because newly untethered people have to download the Cydia program from Saruik's servers. The tethered people only have to download the updated sources lists.
 
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