Yep. It’s a bit sluggish because there is no load on it. I can make it snappy just doing a free Rev, but it will be lean with a load on it.
I’m not a big fan of loading the converter and stomping the throttle trying to hold it. I’ve seen guys kill converters doing that.
And, I’ve had customers kill converters listening to gurus telling them to put the trans brake on and mat the throttle to “see” converter stall. A few of those tests and the converter is junk. The point is to set the tune for greatest stall speed. Ignorant way of doing it, but I watched a video of some YouTube hero doing just that.