Jason,
This is a fun question! We actually set the initial series animation duration to 250 ms, but everything else is Highcharts default. Looking at their API docs, I think refreshes are set to 500 ms, but I haven’t verified that. I’m also not sure how much browser performance can affect the actual animation time, if it does at all. At this point, the only way to change these settings is with a Before Render Snippet. Does that help explain the discrepancies you are seeing?
