The short answer to your question is yes…. Approximately evey 30 minutes, your torrent client updates with the tracker and tells it how much data has been transferred since the last update. For this reason, it may take some time for information that you have transferred to actually be reflected on the tracker.
That being said, also be aware that the total UL/DL stats that you see in your torrent client also include network overhead traffic. As such, you may notice a small difference between what your torrent client reads, and what the tracker reads. Lastly, there's also the issue of session history. When you stop a torrent in your torrent client, your torrent client will still show that you've got some data transferred. When you start the torrent again, the numbers will not match because your torrent client will have kept track of the session stats for that particular torrent as it sits in your torrent client, however the tracker will keep track of the stats for that particular session, which gets reset every time you stop the torrent.
Just a heads up... 🙂