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bogart (31 October, 2009)
I came across this on the webcopyblog
As a rule, the higher the price of what you are selling, the longer the web copy should be.
The short articles work well with bum marketing techniques to target less competitive keywords to rank an article to first front page of the search results.
In the case of 2000 words, I would be inclined to split it into two separate articles. But a good 2000 word article could attract backlinks and become an authority on the topic.
I think articles having more than 500 words is always good. Articles word depends upon quality, More word means more information.