Feature detect devices that send continuous scroll events. Typically fails on iOS, which only sends scroll events after a scroll gesture has come to rest.

jQuery.support.continuousScrollEvents.js

(function(jQuery) {
	var win = jQuery(window);
	var sampleLength = 20;
	var maxInterval = 250;
	var avgInterval = 35;
	var timeStamps = [];

	function diff(n, i, array) {
		return array[i + 1] - n;
	}

	function range(n, i, array) {
		// Throw out large values as they are likely pauses in user behaviour.
		// Throw out 0 values because, well, they likely come from duplicate
		// scroll events.
		return n > 0 && n < maxInterval; 
	}

	function average(t, n, i, array) {
		return t + n / array.length;
	}

	function scroll(e) {
		timeStamps.push(e.timeStamp);
		
		// Wait till the sample is big enough.
		if (timeStamps.length < sampleLength) { return; }
		
		// Then determine if the average time between samples is low enough
		// to consider to be continuous scrolling.
		var interval = timeStamps.map(diff).filter(range).reduce(average, 0);
		
		if (interval > 0 && interval < avgInterval) {
			jQuery.support.continuousScrollEvents = true;
			
			if (window.console && console.log) {
				console.log('Continuous scroll events detected. Average interval:', interval);
			}
		}
		
		// Stop collecting samples.
		win.off('scroll', scroll);
		timeStamps.length = 0;
	}

	win.on('scroll', scroll);

	// Assume that we don't have continuous scrolling by default.
	jQuery.support.continuousScrollEvents = false;
})(jQuery);