Well... If LS links to GPL code that it's authors do not own the
copyright to than this is true. However, as a copyright owner of code
that does not link to any GPL code you are free to release software
under absolutely whatever license you choose... including 'almost
exactly GPL but with x, y, & z differences'. Trolltech licesenses their
code under two different licenses, GPL, & a non-GPL license. But because
they own the copyright to their code this is not a problem.