Yes and it does ...
Quote ...
Log Data When you visit the Site, our servers automatically record information that your browser sends whenever you visit a website ("Log Data" ). This Log Data may include information such as your IP address, browser type or the domain from which you are visiting, the web-pages you visit, the search terms you use, and any advertisements on which you click. For most users accessing the Internet from an Internet service provider the IP address will be different every time you log on. We use Log Data to monitor the use of the Site and of our Service, and for the Site""s technical administration. We do not associate your IP address with any other personally identifiable information to identify you personally, except in case of violation of the Terms of Service.
You can view the Twitter Privacy Policy at:
http://twitter.com/privacyHope it helps you..
Gary