“Game Engine Survey 2011″ article, that can be found in May 2011 Issue of Game Developer Magazine is containing some interesting information about developer’s preferences regarding middleware solutions.
91.4 % of traditional (big-budget) developers prefer to use middleware libraries, and PhysX SDK is holding #4 place – it’s the only one physics engine in this category (we were surprised that Havok was not mentioned).
Far fewer casual developers (48.6 %) are relying on middleware solutions, so unexpensive or free (but good) libraries – FMOD, open-source Bullet engine and PhysX SDK – are the most popular.
Previosly, Game Developer Magazine has performed similar survey in Year 2009.