We are also experiencing significant performance lags, after switching from IE plug in to Full Browser as part of a migration from a single virtual server to a dedicated cluster. The new hardware has very substantial processing power, yet we've seen substantial degradation. Our users are also complaining about limitations in the Full browser UI. We are likely going to have to roll back to the IE Plug In, unless we can figure out how to improve performance and solve the UI problems.
Anyone have experience in this since the original post two years ago?