So I got out the stick blender and gave it a couple short bursts (like 1-2 seconds each) and BOOM - light trace. It was crazy.
It's not really SO crazy. Among the fastest oils are going to be coconut and palm by virtue of their composition.
The perspective I would offer here is that using a stick blender came into fashion among handcrafters not much more than 15 years ago. I think it stemmed from a trend towards making castile and many other fairly high-oleic recipes, not to mention sometimes using really slow linoleic oils like soybean or sunflower, and working at room temperature. Reaching trace in 5 minutes or less with the immersion blender was certainly a feature.
It seems normal to people these days, but I guess the recipes I prefer are a little different on the average. I might have a 5 minute trace, but I soap warm and wouldn't dream of touching most of what I make with anything more than a plastic whisk. To me that's normal and recipes that take 5 minutes with a blender are more extreme.