Let me start off by saying that I think Tealium is a fantastic product and the support is second-to-none. We are getting more than our moneys worth from Tealium and I wholeheartedly recommend Tealium to my peers.
With that said, our experience with Tealium IQ is that it is generally sluggish to work with. Logging in always takes at least 45-60 seconds, sometimes longer. Once logged in, switching between tabs (tags, extensions) requires another 30-60 seconds of waiting each time. Toggling individual tags and waiting for various dialog boxes to open requires a good 10-15 seconds per click.
We estimate our time spent waiting is ~30-40% of our total time inside Tealium. When only one small change is required, this isn't too big of a deal. But when there is a lot of work to do inside Tealium, it can become frustrating.
Do you have any tips for improving TIQ performance? What are the optimal browser/hardware/OS specs? Is this a wide-spread issue that will be addressed in future iterations of the product, or is it unique to our environment?