How can you tell whether the answer is "Cloud" when you don't spell out what the requirements are? In some cases cloud is a good fit for hosting an app, in oth

How can you tell whether the answer is "Cloud" when you don't spell out what the requirements are? In some cases cloud is a good fit for hosting an app, in other cases you are better off using virtual servers, dedicated servers or even colo. Personally, I like using GAE to prototype apps. I can put up an app and get people using it and get feedback. Then using the metrics, I spreadsheet traffic, processor loads, etc and compare the various deployment options.