I've noticed this as well. It tends to get you further than a quick Google search, or two, but quickly reaches a limit or offers incorrect information. That's not to say it isn't helpful for delving into a topic, but it certainly needs much more refining. I would prefer more reference links, and source data to come along with these answers.

Now, overall this is an improvement - since the old way would have been for an amatuer to do a quick google search, and come up with a false conclusion, or get no understanding at all.