Has anyone else had problems with latency?

I've been playing LoL for about 3 weeks now and have had no problems with lag. Ever since the patch was released yesterday, however, all of my games have had considerable lag. My latency usually hovers somewhere between 200 - 350 which makes playing near impossible. It sometimes takes up to 2 seconds for my input to be recognized.

I have no clue what is suddenly going on. Have any of you guys had problems like this? If so, what solutions would you recommend?