You'd be surprised. If you don't take the proper measures to clean the mess it will cause issues.
I spilled a glass with a little bit of water and ice on my keyboard a few weeks ago. I took the keys off and let it dry for 2 days. After hooking it back up I could not get any of the keys to work (once or twice the keyboard worked, my key strokes were messed up). So I had to take it a part and clean the two contact sheets which are below the keys. Seemed like a bit of liquid got in between them and kept causing the keyboard to miss type or not even work. After I cleaned and dried them I was able to get the keyboard working again.
@ Sgt.Collins: As many have pointed out here already, you'd better make sure everything is completely dry before hooking it up to the computer again. Remove the keys, clean with distilled/rubbing alcohol. If you can, also remove the top of the keyboard and let it dry like that atleast a day.