Webi Performance

Is it normal for Webi to take a significant amount of time loading it's micro-cube and rendering to the browser when processing 100,000 records or more?

We've been doing some extensive testing on this recently, and can't seem to find a way to speed this up at all. The more frustrating part is that no one can really explain what the application is doing during those steps in any detail.

Thanks in advance for your input.