it happens all the time when a new jailbreak comes out. I don't know if you remember when the release of the iOS 6 jailbreak came out but everything connected to cydia was being hit with lots and lots of traffic. It was like that for several days before things calmed down and it was easier to download and install tweaks/apps
It was a nightmare to complete any download and install a tweak. It seems this time around, it's not as bad because of all the incompatibility of tweaks and such with iOS 7