Enyo app Paper Mache (Instapaper client) is on the Android market:
https://market.android.com/details?id=net.ryanwatkins.app.pa...
https://market.android.com/details?id=net.ryanwatkins.app.pa...
Its written to the Enyo 1.0 framework that only really targeted the webOS implementation of webkit, so there are some performance issue with sliding and scrolling under Android that didnt appear on the TouchPad.
FYI, I'm the author (http://www.ryanwatkins.net/software/papermache/). Thanks for the plug!
If you switch to "paged" mode rather than scrolling the article the transitions are generally fast when you tap or swipe - atleast with testing on a Nexus S and a TouchPad both running ICS.
I dont think its purely rendering speed, but some odd DOM interactions.