Well, you can scroll to the OP's posts, if you use the feature that allows you to change the colour of their posts to highlight them. That's what I do.
It would be nice though, if you could click a button so that you only saw the OP's posts. It would make finding and reading the OP's posts on a long thread, much easier, and might avoid getting so many posters, who only read the first post, asking questions that the OP has already answered. It would also mean we wouldn't have to waste time scrolling through a thread, only to find the OP never came back to the thread.