[License-discuss] GPL and proprietary WebAPIs

[Clark C. Evans]

I found a tangible example of what I'm referring to, complete with
wonderful visuals.  Chris Kleisath at Sybase describes how they
circumvent the GPL license by using intermediate APIs to link
proprietary functionality with GPL licensed works.  Is Chris correct? 
For GPLv2?  For GPLv3?

http://iablog.sybase.com/kleisath/index.php/2009/02/how-to-interface-proprietary-code-with-gpl-code/