The TIOBE Index has found that Objective-C has overtaken C++ in popularity this July. Objective-C was in sixth place last year and has jumped to third this month.
From TIOBE,
This month there is an interesting change in the TIOBE index: Objective-C has become more popular than C++. Both Objective-C and C++ started in 1983 as object-oriented successors of the C languages. Right from the beginning, Objective-C and C++ competed to become the de facto object-oriented programming language. It took quite some years before C++ could claim victory. Now Objective-C is back (thanks to the iPhone and iPad), but not as a direct competitor of C++ any more. C++ is used heavily in large high-performance systems whereas Objective-C is mainly used in the mobile apps industry.