Android WebView: Very laggy button response

I've got a little web app that I made to play with Android's WebView functionality.

I've got some divs that I use as buttons (with onclick attributes). Upon trying out the app (in the device's browser), I immediately noticed a huge amount of lag after tapping a button. The lag comes between when I tap the button and when the browser shows the orange highlight around it.

I did some testing and got some info:

• JavaScript isn't the problem. I unlinked all my scripts and blanked out all the onclick attributes. The performance didn't change.
• CSS3 stuff isn't the problem. I got rid of all the fancy gradients, and the performance didn't change.
• The number of elements isn't the problem. I tried it with just a few elements on the page, and performance didn't change.
• Doctype and meta stuff isn't the problem. I made sure I was using what Android recommends.

I'm really at a loss as to why there's so much lag. I've eliminated everything that could be causing it, but nothing's helped.

Am I missing something?

How can I remove lag after a button is tapped?

Basically, click events on mobile browsers are delayed by 300ms. Do you know of the fast button pattern? Basically you can use the touchstart event (which fires without delay).

Here's a complete explanation: http://code.google.com/mobile/articles/fast_buttons.html