As far as I know the US servers are never reset unless someone messages Deo and now LG that the server is lagging pretty bad. You can normally tell when the server needs reset when rubber banding happens constantly even with a small amount of people, double, triple and quadruple text, and if the hit boxes are really off. US1 is normally alright but once the server hits 150, it has a meltdown.(The lag kills the fun after a while) This has been my experience anyways.