Delay on mobile / touch devices

[JanMisker]

Hi Fred, fellow Dutchie here ;)
We've been using your nifty little plugin for a while now, all good until we recently noticed that on iPhones (didn't test on Android yet) there seems to be a delay in emitting the 'stuck' event.

We see it also on your demo page. It's maybe 300ms, but it is noticeable.

Any ideas what causes this, and whether there are solutions?