It definitely confuses my users that the position of the scroll bar on their browser does not indicate where you actually are on the time line. The expectation is that scrolling to the top should take you to the first post on the page. I more or less told them to stop thinking in the context of pages.
I would actually prefer if Discourse could override the browser scrolling altogether and integrate the timeline usage in place of that. Or if that could be done in a theme component by the community, just as good.