While that's probably true for the traditional high profile games industry that can't afford any risks, but I would have expected a trend away from C++ (hopefully in favour of Java) as C++ becomes less and less used in general.
In schools, people generally learn java to learn OO programming, so I would have expected more and more students to start developing (indie) games using it. Unless they're tought that java is unsuitable for games? (just thinking out loud...)
I suspect those people at university wanting to enter the games industry are learning C++ in their spare time.
For people coming out of the game industry C++ is what they know best as they have been doing it day in day out. PowerOfTwo games (another start up of ex- main stream people) makes the the point in their blog about prototyping http://powerof2games.com/node/11
. Further illustrating the mindset and perhaps demonstrating why for them it is lowering the risk.
Once you remove the people coming out of the mainstream game industry and those wanting to enter it from the indie game development scene seems to use quite a diverse range of programming languages. It would be interesting to see statistics if they existed.
On a positive note Java has more high quality indie titles now than at any time in the past