[Tomek_]

Well, Symfony2 itself only until very recently was using some of the ZendFramework libraries internally (and Fabien often praised ZF), which I would say comes as a proof that it is a solid code, even if it's obviously lacking in some parts comparing to younger alternatives. In many cases it's still the best thing in the market though (Zend_Search_Lucene, Zend_Pdf, Zend_Amf, Zend_Gdata come to mind).

[eropple]

Well-written code can still be old and slow. ;)