This sounds a lot like some random FUD that you picked up somewhere. If C dev times are so long, why is it that new versions of large scale applications written C are available so often? An adept C programmer can get an application up and running in quite short order. Quick GUI? GTKDialog is available as are: Win32 GUI API, GTK, QT, ncurses, FLTK, and many more. It is also worth noting that should your customer/employer be willing to use some opensource code in his/her/their application, the amount of open source C code available online is quite staggering.
