Well it shows the same scrolling / rendering issue, so at least we can confirm Megacrazy doesn't a have a "slow special" in that department

It's very interesting to see that the issue doesn't occur (or only very slightly) when zoomed out and showing a complex web page with tens of thousands of characters and plenty of images. It only occurs when you've zoomed in fully.

That tells me it is definitely a software issue with the rendering algorithm. If it was raw performance, it would be slower when zoomed out, due to increased scene complexity (whether hardware-assisted rendering or not). Since that's Gecko's area (the heart of Mozilla, Firefox, Fennec) I don't think we can blame Nokia for Gecko's behaviour - after all Gecko is an excellent browser engine choice in most respects - but we can annoy the folks at Mozilla with these videos until they improve it

I have no comment on the other issues.