Shawn King's post | Latest updates on Sulia
iOS 7 on an iPhone 4 running slow? Scott Randell of LIMac points to a solution.
Scott is part of the Long Island Macintosh User Group (http://www.limac.org/) and he emailed me about this problem and a likely solution.
He says, "Installing iOS 7 on an iPhone 4 will slow it to a crawl. There is however a very easy fix. Simply go to settings -> iCloud, and disable (turn off) Documents & Data." http://news.softpedia.com/news/Guide-Fix-iOS-7-Keyboard-Lag-on-iPhone-4-385447.shtml