“Get a better computer and/or mute chat.”
Now, I have experience this lag on many computers, so I doubt it has anything to do with my computer. People who don’t notice it, are most likely also experiencing it, but just not paying attention to it or don’t know that the chat is the reason.
A site is for it’s users, and the site should try to accommodate the users, and not the other way around with users accommodating the site. So an answer like “Get a better computer and/or mute chat.” is just invalid and I don’t think it’s the opinion of kongregate either.