Has your Notification Center ever lagged while opening? For me it takes around 3-5 seconds to open. I found a working solution and if your affected by this problem, try the following.
Steps:
1- Open Settings on your device.

3- Remove all apps that you don’t need from Notification Center (you should still receive badges, alerts, banners, etc.)
•Either drag them down:


• Or remove it by visiting the applications Notification Settings.
4- Test your Notification Center. If it still lags, remove a few more apps.
*Tweaks could also be removed.
That’s it! As simple as counting to 10. Your Notification Center should no longer lag. If it still does even after following all these steps, it could be a Notification Center related tweak.
Let me know if this solved your problems!
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Kenneth Mcaulay
/ March 21, 2012Quite good post. I just happened at your blog and wanted to say that we have seriously loved reading your web site posts. In any case I will be subscribing to your posts and Hopefully you post again rapidly.
koko
/ May 14, 2012SBSettings create the lag from notification center…