Up until now, /questions hasn't given the answers to the questions by default - you'd have to get the question ID and then use that to get the answers to the question. This means the size of the JSON file has increased quite a lot. Also, this change does not follow the pattern of leaving out non-question data - now, comments and bodies are not included, but answers are.
I think the details of the answers should not be included in the questions page unless deliberately asked for by using a parameter like ?answers=true.
Also, the documentation is not helpful. The sample in the "returns" section looks nothing like what is actually returned; it looks more like the JSON version of the help page.
Ultimately the answers need to be able to be turned off using parameters, even if it's opt-out (though personally I think it should be opt-in, as you accessed /questions and therefore asked for questions).
