IOS 7 update made my iPhone 4 slow

My phone is maybe 9 months old and has been working great so far, however when I updated it, suddenly the keyboard lags like crazy. I type an entire sentence blindly and wait about 5-10 seconds before it shows up, and if I hit send, it may only send the first half, leaving the second half ready to send. Sometimes it would lag before the update, but rarely and not nearly this bad. I tried restarting my phone but it didn't help. I'd rather not uninstall the update, but I can't stand typing blindly and waiting for my phone to catch up. Any suggestions on how to fix this?

Apple said that they're fixing bugs on iOS 7 really soon so maybe they'll fix it. Sorry I don't know what to say other than that:/

This is to be expected. If the iphone 4 was not still being offered until last week IOS7 would be not compatible with it. To put it bluntly the phone is showing its age and does not have the power to use IOS 7 to its fullest. It's running the old A4, I'm surprised they got it on the 4 to begin with and because of that the phone will struggle doing certain actions.

Hopefully Apple will release an update IOS that addresses these issues. If you forgot the same thing happened with IOS 6.