That's a great question--really does sound fascinating, Stefano! I'm eager to hear about your results!
My best recommendation is to take a few subjects and watch them use MiniC then traditional C. A good think-aloud protocol may give you a lot of insight into what's going on, e.g., when faced with C, do they explicitly call upon their experience with MiniC? Good luck! Mark -- The Open University is incorporated by Royal Charter (RC 000391), an exempt charity in England & Wales and a charity registered in Scotland (SC 038302).