Have you tried with the latest release 2.1.1? The form panel uses the slower scrolling due to inconstancies between platforms and devices, there isn't much we can do about it at this time.
Tested on 2.1.1
- A form panel with 4 fieldsets, each fieldset with 6 fields
- Nexus 7: Better scrolling.
- Lg Optimus G: Bad performance, so slow, not responsive. the screen starts to lag and gets to slow.
I have tested the Lg Optimus G using Chrome browser and the scrolling is fast and smooth, but when I packaged my app with phonegap and compile that into my device the scrolling looks bad, that because the Webview is still using the old native browser of Android 4.0.