Google tests a new feature that shows the approximate number of words next to certain search results. The word count is usually displayed for articles, but only for a small number of results. You'll probably think twice before clicking on a search result that has 50,000 words, unless you're looking for an in-depth report.
Maybe Google will also add an advanced search feature that lets you restrict the search results to short articles or long documents. A summarization feature would also be helpful.