MultiPointTouchArea generates two "Released" events when used with a mouse. When used with a touch screen, only one released event is generated. The code below generates the following output when used with a mouse:

qmlscene.exe main.qml
qml: QML Pressed QQuickTouchPoint(0x4ef3300)
qml: QML Released QQuickTouchPoint(0x4ef3300)
qml: QML Released QQuickTouchPoint(0x4ef3300),QQuickTouchPoint(0x4ef3300)

When used with a touch screen:

qmlscene.exe main.qml
qml: QML Pressed QQuickTouchPoint(0x6433630)
qml: QML Released QQuickTouchPoint(0x6433630)

import QtQuick 2.2
import QtQuick.Controls 1.1

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    MultiPointTouchArea {
        anchors.fill: parent
        onPressed: {
            console.log("QML Pressed " + touchPoints)
        }

        onReleased: {
            console.log("QML Released " + touchPoints)
        }
    }
}