A think this depends on whether the code being written depends on a lot of other code (frameworks and libraries for example). People that use full-featured IDEs

A think this depends on whether the code being written depends on a lot of other code (frameworks and libraries for example). People that use full-featured IDEs have a much easier time exploring large or unfamiliar codebases so can explore more paths. The best developers I have worked with, in terms of either productivity or 'ability' use high level tools all of the time. And among the worst developers I have known are people that only use vi.