Scrolling has a lot of issues. The behavior seen in the video is common on many websites. And then there are some pages which simply won't load. I do not have examples offhand, though.
Facebook is a really laggy and glitchy affair, even though the screen size is enough to display the full website.
That doesn’t happen to me on my iPad Air running iOS 7. A big part of that might be because I have the iPad connect to a proxy server which blocks a huge swath of ad servers though.