[Be-The-Water]

For me a larger monitor out does any other setup. As a dev I have multiple windows open, generally three or more and I have to move back and forth. The less key strokes, mouse movements or head movement to me means less change in context and the more I can stay on my thought processes. The more I stay focused means less time wasted. This is especially true over a longer period of dev time, or especially when you have a learning curve to work through.

I usually get funny looks from the laptop dev's when I argue the point, but I have gotten a few people to try it and most converted. It maybe a creature of habit issue or get into the practice of going through certain motions but I do not think it is subjective for each individual.