Scrolling speed about SmartGWT.mobile

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Hello,
I am using smartgwt-mobile-1.0d_2013-05-09 and noticed that scrolling speed on android phone and iPhone is quite differnt.
I thought that my code had some problem but I encountered same issue on helloworld.
Scrolling speed on iPhone is fast as I expected but on Android, regardless of hardware specification, scrolling speed is too slow.

Any solution for this?

package com.mycompany.client;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.smartgwt.mobile.client.widgets.Button;
import com.smartgwt.mobile.client.widgets.Dialog;
import com.smartgwt.mobile.client.widgets.NavigationButton;
import com.smartgwt.mobile.client.widgets.Panel;
import com.smartgwt.mobile.client.widgets.ScrollablePanel;
import com.smartgwt.mobile.client.widgets.NavigationButton.NavigationDirection;
import com.smartgwt.mobile.client.widgets.events.ClickEvent;
import com.smartgwt.mobile.client.widgets.events.ClickHandler;
import com.smartgwt.mobile.client.widgets.layout.NavStack;
import com.smartgwt.mobile.client.widgets.toolbar.ToolStrip;
import com.smartgwt.mobile.client.widgets.toolbar.ToolStripButton;

/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class HelloWorld implements EntryPoint {
    // handles application pages history and transitions
    private NavStack navigationStack;

    /**
     * This is the entry point method.
     */
    public void onModuleLoad() {

        navigationStack = new NavStack(getColorsView());
        
        navigationStack.setMomentumScroll(true);
        
        RootLayoutPanel.get().add(navigationStack);
    }

    public Panel getColorsView() {
        Panel panel = new ScrollablePanel("Colors");
        panel.setMomentumScroll(true);
        String[] colors = new String[]{ "blue", "red", "yellow", "green", "gray", "white", "black", "pink", "brown" };
        for (int i = 0; i < 150; i++) {
            String color = colors[(int) (Math.random() * colors.length)];
            Button button = new Button(color);
            button.setTintColor(color);
            button.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    navigationStack.push(getSportsView(((Button)event.getSource()).getTitle()));
                }
            });
            panel.addMember(button);
        }
        return panel;
    }

    public Panel getSportsView(String color) {
        Panel panel = new ScrollablePanel("Sports");
        
        NavigationButton buttonRefresh = new NavigationButton("Refresh", NavigationDirection.NONE);
		
		
        navigationStack.getNavigationBar().setRightButton(buttonRefresh);
        
        
        panel.setMomentumScroll(true);
        String[] sports = new String[]{ "Baseball", "Basketball", "Football", "Hockey", "Volleyball" };
        for (int i = 0; i < 150; i++) {
            String sport = sports[(int) (Math.random() * sports.length)];
            ToolStripButton button = new ToolStripButton(sport);
            button.setInheritTint(true);
            button.addClickHandler(new ClickHandler() {
                @Override
                public void onClick(ClickEvent event) {
                    String sportName = ((ToolStripButton)event.getSource()).getTitle();
                    Dialog dialog = new Dialog("Do you like " + sportName + "?");
                    dialog.setButtons(Dialog.YES, Dialog.NO);
                    dialog.show();
                }
            }); 
            ToolStrip toolbar = new ToolStrip();
            toolbar.setMomentumScroll(true);
            toolbar.setTintColor(color);
            toolbar.addMember(button);
            panel.addMember(toolbar);
        }
        return panel;
    }
}