Probably because when you did that it cleared your cache out. MMOprgs are browser based and therefore don't download software on to your computer. However, they tend to be heavy on the flash cache which is why frequent clearing and cleaning can help a lot.
It might be interesting to note as I'm typing this I'm logged in Tynon. Since its well before most of the US comes online I'm getting less latency issues. Later on it'll be a problem, especially when a player attacks me. It's not being attacked that's the issue it takes me up to half an hour to log back in as it crashes on me. I've missed Cerb 2 days in a row because of that.
