Browsing in the SDK of the SharePoint 2013 Preview I found this:

Two API sets are still supported in the SharePoint 2013 Preview framework for backward compatibility, but we recommend that you not use them for new projects: the ASP.NET (asmx) web services, and direct Remote Procedure Calls (RPC) calls to the owssvr.dll file.

I am so happy that the old style and ancient ASMX are now (finally!) deprecated! Welcome SharePoint 2013!