Hi Ulrich,
1&2. This can be adjusted. You can set the minimum number of characters to trigger the live search here. By default it’s 0. The statistics will respect the same value set there.
3. There is a 250ms delay, but it is hard coded unfortunately. I think I will add an option to adjust that, perhaps it will be useful for others too. I have made an issue request, this will likely be added in the upcoming version, as it’s not too complicated to implement.