We're currently using the Collector to track locations at an interval of 5 seconds. The location tracking service is hosted in ArcGIS Online. This works fine in most cases, but ideally we would like to reduce this further, to an interval of 2 seconds.
I would be interested in any experience with such a small interval or any further thoughts on this subject.
PS In case anyone's wondering, you can reduce the interval from the minimum of 30 seconds using the AGO Assistant.