No, this one isn't true. Performance was one of the biggest problems of webOS. WebOS user forums were full of posts complaining about that. UI built with HTML and JavaScript rendered by Webkit1 was way too much for 2000s hardware to handle.
I was running WebOS on the HP TouchPad. And it was much more pleasant to use than Android on tablets at the time. I meant to the responsiveness from scrolling and swiping through pages.
