Wildcard searches seem unnecessarily slow to me. An OT search in Top Bibles for language* OR tongue* takes around 4.5s on my relatively quick machine. The search language OR tongue takes 1.7 seconds (and returns exactly the same results if you have match all forms turned on).
And while I'm at it, I find it very frustrating that you have to put search operators in upper case. I'm often finding myself with zero results. At the very least I would expect a result "Did you mean Jesus OR Christ" that I could click on to perform the correct search.