According to Gamasutra, Miyamoto explained to shareholders at their most recent meeting that higher-rate visuals on the new console have required around double the effort of Wii games:
When it comes to the scale of software development, Wii U with HD graphics requires about twice the human resources than before.
Miyamoto reiterated a message shared before that Nintendo may not have properly anticipated this jump, which is what led to the delay in Pikmin 3:
Please allow me to explain that we may have underestimated the scale of this change. The overall software development took more time than originally anticipated just as we tried to polish the software at the completion phase of development.
While growing pains between Wii and Wii U development have been evident, Miyamoto also noted that the Nintendo Web Framework, introduced this past April, is expected to aid in future HD development.
Are you worried about Nintendo's struggles adapting to HD, and do you think it's be an issue that'll now be resolved for future releases? Let us know below.