Today morning I came across this piece of writing - Does GPL still matter?. The whole article is based on a few anecdotes from CEOs and marketing droids. They have gotten quite a few points wrong in the article.
GPL is a developer friendly license. The basic premise of the GPL is that the user should not subtract from the freedom he gets when redistributing software. GPL is not restrictive. It merely insists that whoever takes from the common pool must contribute back to the pool.
I would like to point to these 2 articles in support of GPL -