It certainly feels that way.
I've got it working, at least for now. I read a post that mentioned disabling the IPV6 protocol on all network adapters. After doing that, i restarted iTunes and it is currently working.
1. Open Control Panel.
2. Choose Network and Internet.
3. Select the View network status and tasks under the Network and Sharing Center section.
4. Choose your active network connection. It’s usually named “Wireless Network Connection 1″ or something similar.
5. Click the Properties button.
6. If Internet Protocol Version 6 (TCP/IPv6) is checked, uncheck it, then click OK.
7. Click Close.
8. Restart iTunes and try to use the Home Sharing feature again.